Identical twins are rare because they are generated when a fertilized egg is divided into two zygotes and thus generate two different organisms having genetically identical material. Genes are passed on normally in humans due to the inheritance from parents to offspring, they (genes) are passed on in identical twins as copies in the egg cell.
What is the proportion of identical twins in nature?The proportion of identical twins in nature is relatively low in the order of 1 to 250, which inherit the same genes contained in homologous pairs of chromosomes, while fraternal twins denote the process of fertilization of two separate eggs to form different organisms. These genes generate different proteins that will lead to different traits.
Therefore, with this data, we can see that the proportion of identical twins in nature is low because the division of the egg cell after fertilization cell is a rare process.
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Why is a percentage scale used for the x-axis rather than actual ages? A) Researchers dont know the maximum life span of the organisms. B) This scale allows you to compare species with widely varying life spans on the same graph. C) The range of the actual ages would be too large to fit on the graph. D) For any graph, the x-axis and y-axis must use the same units.
It allows researchers to compare species with widely varying life spans on the same graph, the range of the actual ages would be too large to fit on the graph.So the correct option is c.
When discussing the life spans of organisms, it is common to use a percentage scale rather than actual ages on the x-axis of a graph. There are several reasons for this.
First, researchers do not know the maximum life span of the organisms that they are studying. By using a percentage scale, they can compare species with widely varying life spans on the same graph without having to worry about one species having a much longer lifespan than the others.
Second, the range of the actual ages would be too large to fit on the graph. By using a percentage scale, the data can be more easily visualized and compared.
Finally, for any graph, the x-axis and y-axis must use the same units. By using a percentage scale on the x-axis, the researcher can easily use the same units on both the x-axis and y-axis, making the data easier to compare and interpret.
In conclusion, a percentage scale is used for the x-axis of a graph when discussing the life spans of organisms because it allows researchers to compare species with widely varying life spans on the same graph, the range of the actual ages would be too large to fit on the graph, and the data can be more easily visualized and compared if the same units are used on both the x-axis and y-axis.
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If all of the stratospheric ozone suddenly disappeared, ________. A) plants would flourish
B) there would be a dramatic decrease in skin cancers
C) most life on Earth would cease to exist because of the amount of UV radiation penetrating the atmosphere
D) insects would be the only organisms to survive
E) Earth's surface would warm considerably
Answer:C
Explanation:
Why are the 5 main food groups important?
The 5 main food groups helps in providing wide array of nutrition to the body, that helps to promotes healthy life style and also minimizes the risk of stoke and life threatening diseases . These food groups can also helps to add flavors and texture that making eating more interesting .
Hence , if we talk about individual functions of food groups they include ,Carbohydrates are body's primary source of energy or preferred energy source. Carbs are generally broken down by the body into glucose which is also a type of sugar. Protein are responsible to work with cells for maintaining proper structure, function, and regulation of the body's tissues and organs. vegetables and fruits helps lower blood pressure, reduce the risk of heart disease and stroke, prevent cancers. Fats store energy and protect vital organs .
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The greater tubercle of the humerus is more ______ than the lesser tubercle.
The humerus' greater tubercle is more medial than its smaller tubercle. It is positioned posterolateral to the humerus' lesser tubercle and laterally to the humerus' head. At the posterolateral side of the shoulder, one may feel the larger tubercle, which is the humerus' most lateral bony point.
Which tubercle is more medial, the greater or smaller one?Even though it is smaller, the lesser tubercle is more noticeable than the greater one since it is located in front and faces medially and forward.
What is the humerus' larger tuberosity?Two the rotator cuff muscles join to the greater tuberosity, a "bump" of bone near the top of a humerus. Because of this relationship, a fracture may also affect how well the rotator cuff functions.
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Which of the following statements is true regarding the genetic map distance between two markers?
a) Is inversely related to the frequency of chiasma
b) Is directly related to the frequency of crossing-over.
c) Increases in accuracy as the distance between loci increases.
d) Can be estimated by multiplying the recombination frequencies of subinterverals.
e) Adding the subinterverals is less accurate than a direct measure by a two point cross.
The correct option (B) Is directly related to the frequency of crossing-over.
The procedures used to establish the location of a gene and the distances between genes are referred to as gene mapping. Gene mapping may also describe the distances between various locations within a gene.
The purpose of all genome mapping is to place a set of molecular markers on the genome in their proper locations. Molecular markers exist in many different forms and sizes. Genes may be viewed as a type of genetic marker and mapped in the same way as any other marker when creating genome maps. Gene mapping aids in the creation of unique recombinants inside an organism in a variety of fields of study.
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so i kinda need help with this problem, can someone help?
This is what I think maybe this can help you
Individual that is hybrid For a particular trait contains what ?
An Individual that is a hybrid organism is heterozygous. This means that it carries two different alleles at a particular genetic position or locus.
What defines the trait of an individual?Traits can be defined by genes, environmental factors or a combination of both. Traits can be qualitative such as eye colour or they can be quantitative such as height or blood pressure. A given trait is part of an individual's overall phenotype. If an organism has one of the same type of allele on each of its chromosomes, that organism has a pure trait. If an organism has two different types of alleles on its chromosomes, that organism has a hybrid trait.
What is the genotype of a hybrid individual?The genotype of the F1 hybrid offspring is Aa or Bb. The hybrid is heterozygous for both active genes. The recessive effects of aa and bb have been completed in the hybrid by the inheritance of one dominant gene.
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What do clams need to survive?
Clams need aquarium pH: 7.0 – 8.0 and water temperature: 70 – 80 degrees Fahrenheit to survive.
With aquarium pH, some potterers suggest that lower terrarium pH in the upper 6’s may also be respectable to Freshwater Bones. Others try to keep terrarium pH above 7. Water on the acidic side may not be stylish for the bone ’s shell over the long term. Water of the aquarium should be well oxygenated.
Calms care issue relates to terrarium size and the quantum of water it holds. There needs to be enough water in the tank to hold sufficient comestible matter to support the calm ’s nutritive requirements.
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Why did the husband become terrified in the world on turtle's back?
In the beginning of "The World on Turtle's Back," we can see that a character named just as "husband" is terrified of being punished for having destroyed the sacred tree that lit up the world where he lived.
"The World on Turtle's Back," is a myth created by the Iroquois to explain the origin of the earth and living things. In this myth, we can see:
There was a realm above the heavens that was created even before the earth was created.
This realm was inhabited by magical beings who did not die, grow old, or get sick. They were called the people of heaven.
There was a tree in the center of that realm that was holy.
The tree lit up the entire kingdom, since the sun did not exist.
One day, one of the women of the heavenly realm discovered that she was pregnant with twins. She is very happy and tells her husband, but he is furious with the news, to the point of pulling the sacred tree from the ground. This causes a hole and he throws his pregnant wife into that hole.
The man is terrified, not because he threw his wife to an unknown end, but because he destroyed the sacred tree and is afraid of being punished.
Despite the fall, the woman survives and gives birth to the twins who will create all the elements of planet earth.
With this, we can conclude that the Iroquois also created myths to explain things they did not know, such as the origin of the planet and human beings.
Your question is incomplete most probably your full question was
In the beginning of "The World on Turtle's Back," why did the husband become "terrified"? He was terrified the he might never see his wife again. He was terrified that his wife might fall through the hole in the sky. He was terrified that he would be punished for marring a sacred tree. He was terrified that the Great Tree would fall into the ocean.
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What are the non-living component of an ecoytemPick the non-living component of an ecoytem from the provided choice. Producer
Conumer
Herbivore
Air
? The non-living component of an ecoytem are factor
1. The non-living component of an ecosystem is the air.
Thus, the correct answer is D.
2. The factor of non-living component of an ecosystem is an abiotic factor.
In ecology, biotic аnd аbiotic fаctors mаke up аn ecosystem. Biotic fаctors аre the living pаrts of the ecosystem, such аs plаnts, аnimаls, аnd bаcteriа. Аbiotic fаctors аre the nonliving pаrts of the environment, such аs аir, minerаls, temperаture, аnd sunlight.
The non-living, physicаl feаtures of the environment аre cаlled аbiotic fаctors. The prefix а meаns “not.” The term аbiotic meаns “not living.” Аbiotic fаctors include аir, wаter, soil, sunlight, temperаture, аnd climаte. The аbiotic fаctors in аn environment often determine which kinds of orgаnisms cаn live there.
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Enzyme A catalyzes a cellular reaction found in a wide range of species. The table shows data collected on the turnover numbers of Enzyme A purified from two of these species. In both cases, the same conditions were used to measure turnover numbers. Which statement is consistent with these data
ΔG for the two reactions is the same, but the energy of activation for the reaction catalyzed by the mollusk enzyme is lower than the energy of activation for the reaction catalyzed by the bacterial enzyme.
Enzymes are proteins that act as biological catalysts by hastening chemical reactions. Substrates are molecules that enzymes may interact with, and the enzyme converts the substrates into other compounds known as products.
An enzyme is a substance that works as a catalyst in living organisms, controlling the pace at which chemical reactions occur while remaining unaffected. Enzymes play a vital role in decreasing a reaction's activation energy—the amount of energy required for the reaction to begin. Enzymes function by attaching to reactant molecules and keeping them in place so that chemical bond-breaking and bond-formation activities may occur more easily.
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A biologist used the radioisotope tritium (3H) to label thymine and the radioisotope carbon-14 (14C) to label uracil. She then incubated a growing bacterial culture with both labeled bases. After five hours of incubation, the biologist extracted polynucleotides from the cells and separated them into three groups, each containing a range of different polynucleotide lengths. The first group contained the shortest polynucleotides. The second group contained polynucleotides of midrange length, and the third group contained the longest polynucleotides. Then she determined the percentage of each radiolabel in each fraction. Her data are summarized in the table above. Which statement represents a reasonable hypothesis that could explain these results?Uptake of 3H label resulted from DNA replication, and uptake of 14C label resulted from transcription.
The statement that represents a reasonable hypothesis that could explain these results is Uptake of 3H label resulted from DNA replication, and uptake of 14C label resulted from transcription.
The process by which a double-stranded DNA molecule is duplicated to form two identical DNA molecules is known as DNA replication. Replication is necessary because when a cell splits, the two new daughter cells must have the same genetic information, or DNA, as the parent cell.
The process of transcribing a piece of DNA into RNA is known as transcription. Messenger RNA is created when segments of DNA are translated into RNA molecules that can encode proteins. Other DNA sequences are transcribed into RNA molecules known as non-coding RNAs. Only 1-3% of total RNA samples contain mRNA.
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What was indicated in the Mendel's first hypothesis?
Mendel was greatly involved in the field of genetics, and provided first hypothesis or law named as law of segregation.
Mendel's First Law, also known as the Law of Segregation, states that the alleles for a trait separate during the formation of gametes and randomly unite at fertilization. This means that when two parents with different alleles for a trait produce offspring, each offspring will receive one allele from each parent. This law helps to explain why certain traits are inherited, as well as why the ratio of certain traits can be predicted.
The Mendel made all the observation for the hypothesis or law using Pea plant, that was the best model he selected by careful observation skill that he possessed. The Law of segregation was proven by the pea plant as plant producing violet flower having heterozygous condition could give rise to white flowers in next generation, confidently explaining the process of segregation.
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Where is the most ATP produced in cellular respiration ?
The majority of ATP created during cellular respiration is used in the electron transport chain (oxidative phosphorylation).
Cellular respiration is the mechanism by which glucose molecules are broken down into [tex]CO_2[/tex] and [tex]H_2O[/tex] to provide energy from Adenosine Triphosphate (ATP). Additionally, cellular respiration often occurs in an organism's cells by turning the metabolic energy contained in foods into adenosine triphosphate. Additionally, it occurs in three steps, which are the TCA cycle, electron transport, and glycolysis (Oxidative phosphorylation). As a result, the stage of aerobic cellular respiration that produces the most ATPs is called oxidative phosphorylation.
Normally, ATP releases energy by dismantling any weak phosphate cells that may be present. The energy that is released as the phosphate cell disintegrates is then put to use. ADP is created after ATP.
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When shellfish ingest dinoflagellates, a) they turn red. b) they can become poisonous. c) they enter into a symbiotic relationship.
When shellfish ingest dinoflagellates, a) they turn red. So,correct option is a.
Red tides are conditions when a dinoflagellate ingest builds to such gigantic numbers that it stains the water. This "sprout" might be brought about by supplement and hydrographic circumstances, albeit the natural circumstances which bring about red tides are not totally perceived. For dinoflagellate red tides, the water is stained red or brown due to as high as 20 million cells for every liter. These red tides are made fundamentally out of one types of dinoflagellate that has been quickly developing and gathering.
The dinoflagellates are a monophyletic gathering of single-celled eukaryotes comprising the phylum Dinoflagellata and are generally viewed as green growth. Dinoflagellates are generally marine tiny fish, yet they likewise are normal in freshwater natural surroundings. Their populaces differ with ocean surface temperature, saltiness, and profundity. Many dinoflagellates are photosynthetic, yet a huge part of these are truth be told mixotrophic, consolidating photosynthesis with ingestion of prey (phagotrophy and myzocytosis).
Hence,correct option is a.
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What are the conclusion from Mendelian experiment?
Mendel gathered his data for tens of thousands of plants before coming to the conclusion that the traits might be divided into expressed and latent features. These traits were described by him as being dominant and recessive, respectively. In a hybridization, dominant features are those that are passed on unaltered.
The three laws of dominance, independent assortment, and segregation serve as a summary of all the findings of Mendel's experiment. He proposed that each gene be passed down to the organisms twice, once from each parent. In their gametes, organisms only share one copy of each gene. In his opinion, traits are discretely inherited from each parent, one at a time.
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I need help with this. URGENT!!
The nitrogen cycle is a repeating cycle of processes during which nitrogen moves through both living and non-living things: the atmosphere, soil, water, plants, animals and bacteria.
What are the characteristics of nitrogen cycle?The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial, and marine ecosystems.
There are five stages in the nitrogen cycle, and we will now discuss each of them in turn: fixation or volatilization, mineralization, nitrification, immobilization, and denitrification.
The nitrogen cycle matters because nitrogen is an essential nutrient for sustaining life on Earth. Nitrogen is a core component of amino acids, which are the building blocks of proteins, and of nucleic acids.
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During sexual reproduction, two gametes (sex cells) fuse to create a fertilized cell (zygote) with a complete set of chromosomes. What must be true about the number of chromosomes in each gamete
During sexual reproduction, two gametes (sex cells) fuse to create a fertilized cell (zygote) with a complete set of chromosomes. What must be true about the number of chromosomes in each gamete is only one set of chromosomes.
Sexual reproduction is a way of developing living things by combining genetic information from two individuals of different sexes through the process of fertilization. Fertilization occurs when an egg and sperm cell meet to produce a zygote.
Chromosomes are a group of fine threads in cells that function as carriers and stores of genetic information in living things. Gamete cells have one set of chromosomes (haploid) consisting of 23 chromosomes with the composition of sperm cells 22 A + X or 22 A + Y and ovum cells: 22 A + X
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Animals are divided into two groups; vertebrates and invertebrates. Animal classification is a matter of sorting out similarities and differences. This sorting process enables scientists to describe characteristics through the various levels of animal groups and subgroups. Among the most basic criteria by which animals are sorted is whether or not they possess a backbone. This single trait places an animal into one of two groups: the vertebrates (with backbone) or the invertebrates (without backbone). This represents a fundamental division among all animals.
What internal structure identifies an organism as an invertebrate?
Answer:
Maybe exoskeleton?
What is a contrast to natural selection?
Artificial selection is a contrast to natural selection.
Natural selection is the process by which populations of organisms adapt and change. Individuals within a population are inherently variable. In other words, all individuals are different in some way. This variation means that some individuals have traits that adapt better to their environment than others.
Natural selection is the selection process that occurs as a result of an organism's ability to adapt to its environment. Artificial selection, on the other hand, is selective breeding imposed by an external entity, usually a human, to increase the abundance of desirable traits.
Examples of natural selection include : Selection of long-necked giraffes.
Examples of artificial selection include : Breeding different breeds of dogs and cows to produce the desired breed.
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A direct smear from a nasopharyngeal swab stained with Loeffler methylene blue stain showed various letter shapes and deep blue, metachromatic granules. The most likely identification is:
A. Corynebacterium spp.
B. Nocardia spp.
C. Listeria spp.
D. Gardnerella spp.
The identification from a direct smear from a nasopharyngeal swab stained with Loeffler methylene blue stain showed various letter shapes and deep blue, metachromatic granules: Corynebacterium spp.
Thus, the correct answer is D.
Lаborаtory tests from direct exаminаtion of swаbs or blood smeаr of Corynebacterium spp. are
Swаbs should be tаken from involved аreа of nаsophаrynx аnd, if present, underneаth membrаnesGrаm stаining will show grаm-positive rods with pleomorphic morphology. Mаny species аre club shаped and mаy be аrrаnged in pаlisаdes or v-shаped аrrаngements.Neisser or Loeffler methylene blue stаining demonstrаtes metаchromаtic grаnules (limited sensitivity)For more information about nasopharyngeal swab refers to the link: https://brainly.com/question/29819432
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What are 5 things bacteria need to survive?
The five things which bacteria need in order to survive are nutrition, temperature, acidity, oxygen and moisture.
Bacteria are single-celled microorganisms that are able to survive in a number of different conditions. Bacteria are mostly found almost everywhere in the environment.
Bacteria need basic conditions to survive which are nutrition, temperature, acidity, oxygen and moisture. Nutrition helps in bacteria to grow and provides energy.
Different bacterial types need different temperatures in order to grow. Most of the bacteria survive in low acidic or in neutral environments but also a lot of bacterial types which can survive in a wide spectrum of pH. Some bacteria do not require oxygen while some type of bacteria require oxygen in order to grow. Moisture also happens to boost bacterial growth.
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A group of herbivores are separated from their individual population. In the new environment, the only edible
vegetation grows underground.
-What would be a like likely structural adaptation that would occur?
-Explain how step by step how this would result in the population changing over time?
Over time, an adaptation that will make it easier for herbivores to acquire food is a long neck.
What are herbivores?An herbivore is an organism that mostly eats plants. A herbivore can be any size, from tiny insects like ants to huge, massive elephants. Herbivores make up a substantial portion of the food web, which is a description of the species that eat other animals in the wild.
Humans are they herbivores?We are physically herbivorous, despite the fact that many people prefer to consume both plants as meat, giving us the questionable moniker of "omnivores." The good news is that it's still possible to dine like our ancestors: Vegetables, fruits, nuts, and legumes form the foundation of a wholesome vegan diet.
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How would cyanide poisoning affect the rest of the ETC and proton gradient across the inner mitochondrial membrane?
After the cyanide poisoning the proton gradient will be reduced. Moreover, it will lead to the stopping of the electron transport chain (ETC). Because it prevents the complex IV from transporting electrons, cyanide functions as a poison.
Most of the electron transport chain will abruptly slow down and cease if complex IV cannot transmit electrons. Protons won't be pumped out of the matrix and into the intermembrane space if electrons aren't traveling along the transport chain. The gradient will deteriorate as the protons already in the intermembrane space move down their gradient and into the matrix because they won't be replaced. Thus, this will cause the intermembrane space's pH to decrease.
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Did those who were successful in Round One survive equally well when others were competing for food at the same dish during Round Two
No, those who were successful in Round One will not be successful in Round Two since there will be increased competition.
In the pursuit of a single, unshareable aim, competition is a contest between two or more parties in which one side gains an advantage over the other (an example of which is a zero-sum game). Humans, social and economic organisations, and living things are all competing entities. It provides people a variety of employers and working settings while also creating jobs.
Additionally, competition lessens the need for government intervention through business regulation. Consumers, society, and individual liberty all benefit from a healthy, competitive free market. Studies show that competition can promote focus, effort, and learning. A student may be motivated to work significantly harder on their homework by the social pressure of competing with other students.
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The Young-Helmholtz theory proposes thatA. there are four different types of conesB. there are three different types of color-sensitive conesC. retinal cells are excited by one color and inhibited by its complimentary colorD. rod, not cone, vision accounts for our ability to detect fine visual detail
Option A, The Young-Helmholtz theory proposes that B. there are three different types of color-sensitive cones in the eye that are sensitive to different wavelengths of light, which allows us to perceive a wide range of colors.
These cones contain pigments that respond to different parts of the visible spectrum, such as red, green and blue. This theory sensitive states that the sensitive brain interprets the relative stimulation of these cones as different colors. There are four different types of cones is not accurate, because the Young-Helmholtz theory states that there are three different types of cones. Retinal cells are excited by one color and inhibited by its complimentary color is not accurate either. The retinal cells are sensitive to different wavelengths sensitive of light and the brain interprets the relative stimulation of these cells as different colors. rod, not cone, vision accounts for our ability to detect fine visual detail is not accurate according to the Young-Helmholtz theory, which focuses on the role of the cones in color vision, not the rods. Rods are responsible sensitive for our ability to see in low light conditions and detect fine details in dim light.
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What are the 3 types of adaptations that enable an organism to survive?
Behavioral adaptations, physiological adaptations and structural adaptations are the three types of adaptations which enable an organism to survive.
All living organisms need to adapt in order to survive. There are three types of adaptations which can enable a particular organism to survive and they include the behavioral, physiological and structural adaptations.
Structural adaptations are basically the unique features present in an organism's body which help it to survive in a particular condition. For example, ducks have webbed feet which help them to swim. The changes in different processes that occur inside an organism's body include the physiological adaptations. For example, some spiders change the physiological processes in their body to weave webs using different spider silks. Behavioral adaptations are changes in the actions which allow the organism to survive. For example, coyotes communicate by howling at night.
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This is due today, I’ll give brainliest to whoever answers with the best answer.
This is for 30 POINTS!!!!!!
DUE TODAY
Gravity holds the sun, earth, and moon together, and these three bodies engage in a variety of interactions. Due to the earth's gravitational attraction, the moon revolves the planet. And because of the sun's gravitational attraction, the earth orbits the star.
What angle is the Moon at with respect to the Sun and Earth?The Moon travels in tandem with Earth's orbit around the Sun. Despite the Earth's continued motion, the Moon must travel two additional days during its orbit, which lasts 27 1/2 days.
How near to one another are the Earth, Moon, and Sun?The Moon is 384,403 kilometres away from Earth on average. Additionally, there are 149,597,887 kilometres between the Earth and the Sun on average.
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The genetic information in a gamete is identical to one of the original separated sets of chromosomes in the parent.
1.True 2.False
The given statement " the genetic information in a gamete is identical to one of the original separated sets of chromosomes in the parent" is true because gametes contain only one of a chromosome pair that exists in the diplod parents cells.
Hence, the correct option is True.
What are chromosomes?A chromosome is a lengthy DNA molecule that contains all or a portion of an organism's genetic code. The very long, thin DNA fibers in most chromosomes are covered with packing proteins; in eukaryotic cells, the histones are the most significant of these proteins.
During the process of gamete formation or meiosis in parental sex cells, the pair of chromosomes in the parent cells divide to produce daughter cells or gametes containing only singer chromosomes,
Thus, the gametes contain only one set of chromosomes identical to the parent's chromosomes.
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Answer: it’s True<3
Explanation: WHY HASNT YALL BE ONLINE!!!
How nutritional information from food labels is used to identify if each of the products is high low or neither in terms of fat sugar and salt content?
Explanation:
Food labels always state the sugar, fat and salt content in percentage or per 100 grams or per serving to help consumers in their selection of products.