Answer:
B
Explanation:
They come from other Rocks or living things such as bones,leaves,stems, etc.
The _______ is the part of the digestive tract that has the most lymph nodules and bacteria.
A. duodenum
B. jejunum
C. ileum
D. colon
The part of the digestive tract that has the most lymph nodules and bacteria is the ileum, which is present in Option C, and the gut bacteria play an important role in digestion.
What is the importance of the ileum in digestion?The small intestine is important in digestion because it contains the duodenum, jejunum, and ileum, with the ileum being highly folded to facilitate digestion and absorption rates into the blood; additionally, there are many gut bacteria that aid in digestion.
Hence, the part of the digestive tract that has the most lymph nodules and bacteria is the ileum, which is present in Option C, and the gut bacteria play an important role in digestion.
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What are the processes of independent assortment and recombination?
Recombination is the process that occurs during meiosis in which pieces of DNA are broken and recombined to create new combinations of genes. During meiosis, chromosomes randomly move to separate poles. This process is known as independent sorting.
Genetic recombination is a process that occurs during meiosis (cell division that results in gametes). During this process, homologous chromosomes combine to form units known as tetrads. Chromosomes then cross over and exchange genetic material, creating new combinations of alleles. Recombination mixes pieces of the maternal and paternal genes together so that the genes can be classified independently.
After meiosis, gametes have 23 chromosomes, but independent arrangement means that each gamete has one of many different combinations of chromosomes. Different genes and alleles are inherited independently, according to the law of independent classification within sexually reproducing organisms. Chromosomes separate into multiple gametes during meiosis. The crossover process rearranges the linked genes on the chromosome. Mendelian bicrosses are a good example of independent assortment.
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2. The evolution of several key innovations in the animal body plan was instrumental to animals' success as group_ Choose any two of Ihese innovations and brielly explain how each one was adaplive (i.e. how it specilically contributed t0 animals evolulionary success).
The development of the mouth and anus in the embryo helps establish animal body plans.
What influences an animal's body structure?The development of the mouth and anus in the embryo helps establish animal body designs. Protostomes are animals that grow their mouths first, whereas deuterostomes develop their anus first.A unique phenotypic characteristic that enables future radiation and the success of a taxonomic group is referred to as a "key innovation" in evolutionary biology. This term is also used to refer to an adaptive breakthrough or key adaption.The fundamental arrangement of the organs and bodily tissues is referred to as an animal body plan. Animal body plans often have two main elements in the animal kingdom: symmetry and the arrangement of tissues and bodily compartments.To learn more about Animal body plans refer to:
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How many phenotypes are possible with 4 alleles?
We all have alleles, or versions, of every gene. Being homozygous for a selected gene approach you inherited equal versions many phenotypes are possible with 4 alleles are 16.
It's the alternative of a heterozygous genotype, in which the alleles are distinct. People who've recessive traits, like blue eyes or purple hair, are continually homozygous for that geneAlleles make contributions to the organism's phenotype, that is the outward look of the organism. Some alleles are dominant or recessive.
When an organism is heterozygous at a selected locus and includes one dominant and one recessive allele, the organism will explicit the dominant phenotype.Since every figure has 4 distinct combos of alleles withinside the gametes, there are 16 feasible combos for this cross.
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What are the 4 steps of the carbon cycle?
Respiration, combustion, decomposition, and photosynthesis. Carbon enters plants and other living things through the atmosphere.
Using light energy, plants and some other organisms engage in a process known as photosynthesis that results in the creation of oxygen and high-energy carbohydrates like sugars and starches.
Respiration is the process by which a living thing or cell absorbs oxygen from the atmosphere or water, disperses it for oxidation, uses it, and releases products of oxidation.
Combustion is the process of burning fuels to create heat and light.
Decomposition is the disintegration of organic material
Which 4 spheres make up the carbon cycle?In all four of the planet's major spheres—the biosphere, atmosphere, hydrosphere, and lithosphere—carbon is a very prevalent element.
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What is the mRNA codon for TTT?
The mRNA codon for TTT is bldA gene.
Genes are made up of sequences of DNA and are arranged, one after another, at specific locales on chromosomes in the nexus of cells. The bldA gene encodes a Leu- tRNAUUA patch that's needed to express rare TTA codons, garbling Leu, which are known to be concentrated in genes garbling biosynthetic and nonsupervisory proteins.
Phenylalanine (TTT) can beget intellectual disabilities, brain damage, seizures and other problems in people with PKU. Phenylalanine occurs naturally in numerous protein-rich foods, similar as milk, eggs and meat. Phenylalanine is also vended as a salutary supplement.
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Which of the following are reasons why eukaryotes have a more complex gene regulation than prokaryotes?
a. Eukaryotic DNA is organized into chromatin.
b. In eukaryotes, transcription occurs in the nucleus, while translation occurs in the cytoplasm.
The correct option b. In eukaryotes, transcription occurs in the nucleus, while translation occurs in the cytoplasm are reasons why eukaryotes have a more complex gene regulation than prokaryotes.
Most eukaryotes have larger, more complex genomes than prokaryotes do. Since more genes are often found in more complex species, the larger size of eukaryotic genomes is not a major surprise. The size of many eukaryotes' genomes, however, does not seem to be correlated with their genetic complexity.For instance, while having genomes that are more than ten times as large as those of humans and salamanders, respectively, these creatures are unquestionably not ten times as complicated than ourselves.
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Do snails have both reproductive organs?
Yes, snails have both the reproductive organs. Mostly, snails are hermaphrodites, with both male and female sexual organs in the same body.
Do snails have both the reproductive organs?Garden snails generally hibernate during winters and they have both the female and male reproductive cells as they are hermaphrodite. They don't need to mate with another snail in order to reproduce as self fertilization is possible.
Most of the terrestrial gastropods are hermaphrodites, but some snails do not have this attribute, like some freshwater snails like the Apple Snails and periwinkles. These two types of snails have separate male and female individuals.
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A B cell is first stimulated by ______.free antigenantigen presented on an MHC class I molecule of an infected cellantigen presented on an MHC class II molecule of an APCantigen presented on an MHC class I molecule of an APC
Antigen presented on a MHC class II molecule. The antigen is delivered by the B-cell antigen receptor to intracellular locations, where it is broken down.
Sent back to the surface of the B-cell as peptides attached to MHC class II molecules. Armed helper T cells that are specific for an antigen can recognise the peptide: MHC class II complex, inducing them to produce proteins that cause the B cell to multiply and its offspring to develop into cells that secrete antibodies. In the absence of assistance from T cells, some microbial antigens can directly activate B cells. Many significant bacterial infections can be quickly responded to thanks to the B lymphocytes capacity to react directly to these antigens. However, the interaction of antigen-stimulated B cells with helper T cells and other cells is necessary for somatic hypermutation and switching to specific immunoglobulin isotypes.
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during prophase 1, replicated homologous chromosomes pair up and undergo synapsis. what testable question is generated regarding synapsis and genetic variability?
During prophase 1, replicated homologous chromosomes pair up and undergo synapsis. the following testable question is generated regarding synapsis and genetic variability is that, " is the distance between two gene loci related to crossover rate?"
By recombining combinations of gene alleles on a single chromosome that always segregate together, synapsis and crossing-over mechanisms increase genetic diversity. A synapsis is formed by the joining and pairing of homologous chromosomes. This occurs during the first stage of meiosis, known as prophase I.
Mutation (which can generate completely new alleles in a population), random fertilization, random mating, and recombination among the homologous chromosomes during meiosis (which reshuffles alleles inside an organism's offspring) can all cause genetic variability.
The likelihood of a crossover among two genes is proportional to their distance apart. That is, the greater the distance between two genes, the more likely it is that they will cross over during meiosis.
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What are two risk factors that can be modified by lifestyle changes to reduce the risk of heart disease?
The two most important risk factors which can be modified to reduce risk of heart diseases are reducing the smoking rate and avoiding excessive junk food.
Heart diseases are those which affect the functioning of heart such as ability to pump blood properly or generation of electrical signals inside the heart so that the cardiac cycle can be continued smoothly. Risk factors are those conditions which affect the chances of diseases being worse with time. Heart is related to lungs almost directly as pulmonary system and cardiovascular system work in coordination with each other.
Excessive smoking causes damage to bronchioles and lungs due to suffocation and settling of harmful particulate matter inside the lungs. Similarly, excessive junk food chokes the heart muscles and arteries due to accumulation of cholesterol and fat. Lack of physical exercise is also one of the cause. Alcohol consumption, stress and anxiety and opium consumption is also disastrous for heart.
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Select the correct term. The sciatic nerve divides into the tibial and POSTERIOR FEMORAL CUTANEOUS / COMMON FIBULAR nerve.
The sciatic nerve divides into the tibial and COMMON FIBULAR nerve.
Leg discomfort, weakened sensation, numbness, or tingling are all symptoms of sciatica. The sciatic nerve is harmed or put under pressure, which causes it. Sciatica is a sign of a health issue. By itself, it does not constitute a medical condition.
When the sciatic nerve is squeezed, sciatica develops. A herniated disc in the spine or an expansion of bone, commonly referred to as bone spurs, on the spinal bones are the usual causes. Occasionally, a tumour may irritate the nerve. Alternatively, a condition like diabetes can harm the nerve.
A significant nerve that innervates the lower extremity is the common peroneal nerve, commonly referred to as the common fibular nerve. It gets fibres from the posterior divisions of L4 through S2 and is one of the sciatic nerve's two main branches.
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What are the 2 main processes that occur during meiosis that explain why there is so much diversity between individuals of the same family and within the same species?
Genetic recombination via Crossing over and independent assortment of gametes are the 2 main processes that occur during meiosis that explain why there is so much diversity between individuals of the same family and within the same species.
The physical breakage, exchange, and rejoining of two DNA molecules is known as genetic recombination. In bacteria, several different pathways can mediate homologous or general recombination. RecA protein is required for each of these pathways to align the DNA molecules between regions of significant DNA sequence identity.
Crossing over is a cellular process that occurs when identical chromosomes line up during meiosis. Parts of the chromosome can be switched when two chromosomes — one from each parent — line up. The same genes may exist on both chromosomes, but in different forms.
Alleles from two (or more) different genes are sorted into gametes independently of one another, according to Mendel's law of independent assortment. In other words, a gamete's allele for one gene has no effect on the allele received for another.
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Match each cell type with it's effector response.
Apoptosis is used by cytotoxic T lymphocytes to kill infected cells.
Antibody-producing plasma cell.
Releases cytokines and interleukins to activate other cells.
T and B cells undergo differentiation into effector cells after activation, which carry out vital effector tasks such generating cytotoxic antipathogen chemicals and antibodies, respectively. Innate, adaptive, & passive immunity are the three kinds that exist in humans. innate defense: Innate (or natural) resistance is a form of all-encompassing defense that is present from birth. The skin, for instance, serves as a barrier to prevent pathogens from entering the body. Lymphocytes (T cells, B cells, & NK cells), neutrophils, and monocytes/macrophages are the immune system's most prevalent cell types. White blood cells come in a variety of forms. T cells can eliminate malignant or contaminated cells. Additionally, they control the immune reaction by assisting B cells in eradicating foreign infections. Antibodies are made by B cells.
(Match each cell type with it's effector response.
Cytotoxic T cell: Releases interleukins and cytokines to stimulate other cells
Plasma cell: Destroys infected cells via apoptosis
Helper T cell:Produces antibodies )
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Art-Labeling Activity: Anatomy of the urinary tract 18 of 24 Drag the appropriate labels to their respective targets. Rese Ureters External urethral sphincter Urethra Urinary bladder Trigone Rugae Levator ani muscle Internal urethral sphincter Peritoneum Ureteral openings Lumen Mucosa (transitional epithelium) Musculart Adventitia (b) Cross-sectional histology of ureter Lumen Mucosa (transitional epithelium) Detrusor muscle LM Sond (a) Organs of the urinary tract (c) Histology of urinary bladder wall
Rese Ureters External urethral sphincter Urethra Urinary bladder Trigone Rugae Levator ani muscle Internal urethral sphincter.
Where Detrusor muscle is found in the bladder?Detrusor muscle is found in the bladder. Contraction of the detrusor muscle compresses the urinary bladder and expels it's contents into the urethra.
Trigone acts as a funnel that channels urine into the urethra when the urinary bladder contracts. Internal urethral sphincter is located in the neck of the urinary bladder. It provides involuntary control over the discharge of urine from the bladder.
Therefore, Rese Ureters External urethral sphincter Urethra Urinary bladder Trigone Rugae Levator ani muscle Internal urethral sphincter.
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explain how selective breeding can use gentic trait mutations
Answer:
Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics. Humans have selectively bred plants and animals for thousands of years including: crop plants with better yields.
Explanation:
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When adenine base pairs with thymine hydrogen bonds form and when cytosine base pairs with guanine hydrogen bonds form?
Adenine and Thymine invariably base pair with Cytosine and Guanine in DNA. These pairings take place because of the geometry of the bases, which only permits hydrogen bonds to form between certain pairs. While cytosine and guanine will make three hydrogen bonds, adenine and thymine will only form two.
Only in DNA may adenine and thymine be paired as bases. The two nitrogenous bases are joined by two hydrogen bonds. One of the hydrogen bonds is created between the oxygen atom of the keto group at C-4 of thymine and one of the amino group's hydrogen atoms at C-6 of adenine.
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Which three statements correctly describe the processing that takes place before a mature mRNA exits the nucleus?
A. Noncoding sequences called introns are spliced out by molecular complexes called spliceosomes.
B. A translation stop codon is added at the 3' end of the pre-mRNA.
C. A cap consisting of a modified guanine nucleotide is added to the 5' end of the pre-mRNA.
D. A poly-A tail (50-250 adenine nucleotides) is added to the 3' end of the pre-mRNA.
E. Coding sequences called exons are spliced out by ribosomes.
The processing that takes place before a mature mRNA exits the nucleus,
A translation stop codon is introduced to the pre-mRNA's 3' end.
c. The 3' end of the pre-mRNA gets a poly-A tail (50–250 adenine nucleotides) attached to it.
d. Ribosomes splice out coding segments referred to as exons.
In eukaryotes, RNA must leave the nucleus through the nuclear membrane's pores and reach the cytoplasm to undergo translation during protein synthesis. The 3' Poly-A tail, 5' capping, and pre-mRNA splicing are the mRNA's departure mechanisms.The 5'capping procedure involves adding a 7-methylguanosine cap through phosphate linkage to the 5' end of the mRNA. This procedure helps to start translation processes and prevents mRNA degradation.The cleaving of pre-mRNA and attachment of about 200 A nucleotides, or the 3'poly (A) tail, to the mRNA by the poly (A) polymerase enzyme protein complex is known as the 3' Poly-A tail step. This facilitates the transfer of mRNA to the cytoplasm, stops pre-mRNA degradation, and starts translation.
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Explain what is happening at each numbered step in the diagram below
Steps are in protein synthesis:
1) m-RNA
2) ribosome / r-RNA
3) amino acid
4) t-RNA
5) peptide linkage.
What is protein sysnthesis?The cytoplasm contains ribonucleoprotein particles called ribosomes, which are where protein synthesis takes place. In biology, the process of protein synthesis is crucial to cellular survival. The process through which cells produce proteins is known as protein synthesis.
Function of these steps in protein synthesis -
1) m-RNA : The function of mRNA is to transport protein information from DNA in a cell's nucleus to the cytoplasm, or watery interior, where the machinery responsible for making proteins reads the mRNA sequence and converts each three-base codon into an amino acid that belongs in a protein chain that is expanding.
2) ribosome / r-RNA: The catalytic stages of protein synthesis—the joining of amino acids to form a protein molecule—are governed by the rRNA molecules. To represent this role, rRNA is frequently referred to as a ribozyme or catalytic RNA.
3) amino acid: Long thought to as little more than protein synthesis substrates, amino acids have lately been demonstrated to operate as modulators of intracellular signal transduction pathways frequently linked to growth-promoting hormones like insulin and insulin-like growth factor1.
4) t-RNA: The primary role of tRNA is to transfer amino acids to create polypeptides in the proper order. As a result, it aids in protein synthesis. Additionally, it serves as an adaptor molecule by connecting particular amino acids to the appropriate codons found in the mRNA molecules.
5) peptide linkage: Covalent bonds between two amino acids are known as peptide bonds. Proteins are large chains of amino acids that are created by living things via peptide bonds. In addition to providing structural support, initiating significant processes, and identifying chemicals in the environment, proteins have a variety of other activities.
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Which of the following is the best explanation for presence of both chloroplasts and mitochondria in plant cells?
A. In the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs
B. If plants cannot produce enough ATP in the process of photosynthesis to meet their energy needs, they can produce it in aerobic respiration
C.Sugars are produced in chloroplasts. These sugars can be stored in the plant for later use, converted to other chemicals, or broken down in aerobic respiration to yield ATP for the plant to use to meet its energy needs.
D. The leaves and sometimes the stems of the plants contain chloroplasts which produce ATP to meet the energy needs of these plant parts. The roots of plants contain mitochondria which produce ATP to meet the energy needs of these plants.
Answer:
Plant cells require both chloroplasts and mitochondria since they carry out both cell respiration and photosynthesis.
Explanation:
sum of all physical and chemical changes that take place inside the cells of human body.
The sum of all physical and chemical changes that take place inside the cells of human body is known as Metabolism.
The organism uses the energy given off by respiration in cells to power its ongoing, enzyme-controlled metabolic activities for the production of new molecules. Transformation of glucose into starch, glycogen, and cellulose is one example of a metabolic process.
A living thing's metabolism is the culmination of all the chemical activities that occur inside each cell and supply the energy for both essential functions and the synthesis of new organic substances. The ability to draw energy from their surroundings and utilise it for tasks like movement, growth and development, and reproduction makes living things special.
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What did Mendel conclude about how traits are inherited in pea plants?
Gregor Mendel has been observed that pea plant traits did not blend in with their offspring. This would led him to figure that living items do not merge their offspring.
What do you mean by offspring?The term offspring has been refers to the young innovation of the living beings. That particular organism has been assembled either by an individual organism or, in the topic of physiological property, reproduction between the two organisms.
The main reason for this is that the offspring of the living creature will have one parent trait or the other parent trait, but they do not blend or mix together, such as when two plants are tall and the other is short; the children will be tall or short, but not medium size.
Therefore, Gregor Mendel has been observed that pea plant traits did not blend in with their offspring. This would led him to figure that living items do not merge their offspring.
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What is a germline cell?
What is insertion and deletion in mutation?
Indels, or insertion–deletion mutations, are events with a length of less than 1 kilobase point that occur in genomic DNA.
An organism's DNA sequence is altered by a mutation. Errors in DNA replication during cell division, exposure to mutagens, or a viral infection can all cause mutations.
By inserting one or more nucleotides into the gene, an insertion alters the DNA sequence. Accordingly, the protein produced using the quality may not work as expected. Deletion. By removing at least one nucleotide from a gene, a deletion alters the DNA sequence. One or a few nucleotides are deleted from a gene by small deletions, while an entire gene or several neighboring genes can be deleted by larger deletions. The affected protein or proteins' function may be altered by the deleted DNA.
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What factors can influence the rate of transport in cell membrane?
Answer:
the mass of the solute, the temperature of the environment, the solvent density, and the distance traveled.
Some conservation biologists focus on areas where the greatest number of unique species can be protected with the least amount of effort. These areas are called...wildlife corridorshabitat fragmentsbiodiversity hotspotsconservation concessions
Biodiversity Hotspots
How many genes make up the human genome four adenine thymine guanine and cytosine 23 pairs of genes 20000 25000 genes billion genes?
Genes are the hereditary units, which are present in the coded segments of the DNA. Genes carry the information from parent to daughter cells.
There are 20,000 to 25,000 genes that make up the human genome.
Human Genome Project was conducted for several years, the result obtained was:
The human genome project was an international scientific project, which aimed at determining the base pairs that make up the human DNA.
The project estimated that humans consist of 20,000 to 25,000 genes in their genome. Each individual inherits the copies of genes from both parents.
Therefore, the correct answer is Option C.
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__________ evolution leads to __________ structures.
Convergent, analogous. If two species from separate evolution branches have comparable ecological functions and natural selection has sculpted parallel adaptations, they may start to resemble.
Analogous structures demonstrate that comparable selection forces might result in similar adaptations with advantageous traits, whereas homologous structures demonstrate evidence for shared ancestry. The relatedness of different species can be ascertained by comparing and contrasting biological molecules, such as the DNA sequence of genes.
Natural selection, genetic drift, gene flow, and mutation are the four driving forces behind evolution. In a gene pool, mutation produces new genetic variety. A population's genetic makeup evolves throughout time as a result of the process of evolution. Genes can change as a result of an organism's adaptation to its environment, which is reflected in evolution.
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specific adaptations that animals have developed to survive in humid subtropical climates
Answer:
Animals that live in humid subtropical climates have developed a variety of adaptations to help them survive and thrive in these conditions. Some examples of these adaptations include:
:Thick, insulating fur or feathers: Many animals in humid subtropical climates have thick fur or feathers that help to keep them warm and dry in wet conditions. This can help to prevent heat loss and maintain body temperature, which is especially important in environments where the air is cool and damp.
:Waterproof skin or scales: Many animals in humid subtropical climates have skin or scales that are waterproof or water-repellent. This helps to prevent them from getting waterlogged and can make it easier for them to move through wet environments.
:Webbed feet or other adaptations for swimming: Some animals in humid subtropical climates, such as amphibians and aquatic mammals, have webbed feet or other adaptations that allow them to swim efficiently. This can help them to move through wet environments and avoid predators.
:Behavior patterns that minimize exposure to heat and moisture: Many animals in humid subtropical climates have behavior patterns that help them to avoid the heat and moisture that can be common in these environments. For example, some animals may become inactive during the hottest parts of the day, or may seek shelter in cool, damp areas during times of extreme heat or moisture.
:Specialized digestive systems: Some animals in humid subtropical climates have specialized digestive systems that allow them to extract nutrients from wet or damp foods, such as grasses and leaves. This can help them to survive in environments where food may be scarce or difficult to access.
Overall, the specific adaptations that animals have developed to survive in humid subtropical climates vary depending on the species and the specific conditions of the environment. However, these adaptations generally help animals to regulate their body temperature, move efficiently through wet environments, and access food and other resources in these conditions.
Explanation:
explain where. in the world. the hbs allele is mostly likely to be prevalent and why the allele persists in spite of the danger associated with having two hbs alleles
The hbs allele is most likely to be common in regions with high rates of malaria like African area. The heterozygotes are not negatively impacted and are provided a benefit in these areas, therefore the allele survives.
What does the Hbs allele correspond to?Sickle cell anemia, which develops when two copies of the Hbs allele are inherited, is a serious, chronic condition that can be fatal. Hemoglobin becomes aberrant as a result, forcing the red blood cell to assume a crescent-shaped form and becoming hard as opposed to flexible. The red blood cell's shape is slightly altered by inheriting one copy of the Hbs allele (becoming a carrier), but not significantly enough to impair function as in the full disorder.For more information on Hbs allele kindly visit to
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