Down's syndrome occurs because of a(n)



missing sex chromosome



extra sex chromosome



additional 21st chromosome



additional 18th chromosome

Answers

Answer 1

Answer:

C.Additional 21st chromosome

Explanation:

Hope this helped :)


Related Questions

How does golgi apparatus and lysosomes work together

Answers

Answer:

A lysosome is basically a specialized vesicle that holds a variety of enzymes. ... Those proteins are packaged in a vesicle and sent to the Golgi apparatus. The Golgi then does its final work to create the digestive enzymes and pinches off a small, very specific vesicle. That vesicle is a lysosome.

The glycoside bond formed is similar to which of the following in proteins?
A) bond in amine group B) peptide bond
C) disulfide bond D) bond in the β . sheet

Answers

Answer:

B) peptide bond

Answer

B

Explanation

Mark Brainliest please

help!
Which description is not a property of an acid?

Sour taste
Slimy Feel
dissolve metals
corrosive

brainliest will be possible!! ​

Answers

Answer:

Slimy feel, you can know this because citric acid or Lemmon juice

Explanation:

If you make mutations in the nuclear localization signal of a nuclear protein, what will happen to the protein

Answers

Answer:

What would happen if the operator sequence of the trp operon contained a mutation that prevented the repressor protein from binding to the operator? a. In the absence of tryptophan, the genes trpA-E will not be transcribed. b. In the absence of tryptophan, only genes trpE and trpD will be transcribed. c. In the presence of tryptophan, the genes trpA-E will be transcribed. d. In the presence of tryptophan, the trpE gene will not be transcribed.

Explanation:

What are the importances of Dissacharides

Answers

Answer:

Dissacharides are very important for many things in the body. They provide fuel for the cells, which ultimately determine our quality of life since their fuel regulates blood glucose levels, erythrocyte membrane stability, erythrocyte osmotic fragility and immunological competence.

An increase in lipid oxidation is seen when glucose intake is increased through high dissacharide consumption and may be helpful to individuals with non-insulin dependent diabetes mellitus (NIDDM) type 2D who have lipid disorders such as hyperlipidemia that use dissacharide consumption change lipid levels and decrease their chances of developing atherosclerosis. This also helps people with NIDDM type 2C get rid of

Explanation:

Which cell would have a better chance for survival, one that is 1×1×1 cm or one that is 4×4×4 cm?

Answers

Answer:

which cell would have a better chance for survival that is 4*4*4cm

What is sun ? Pls answer me

Answers

The Sun is a star. It is a huge, spinning, glowing sphere of hot gas. The Sun is just like the stars that you see in the night sky. ... The Sun is the center of our Solar System and contains most of the mass in the Solar System. All of the planets in our Solar System, including Earth, orbit around the Sun.

Answer: The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as visible light and infrared radiation.

Explanation:

Which of the following examples best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem?
Choose 1 answer:
Choose 1 answer:

(Choice A)
A
A frost in late spring kills some of the earliest budding plants and flowers in a field.

(Choice B)
B
Tens of thousands of geese rest for a week at a large lake during their annual migration.

(Choice C)
C
The failure of a 60-year-old beaver dam floods a downstream meadow.

Answers

i would say C. resting isnt really going to change anything, they are still migrating and only SOME of the budding plants were killed not all.

The failure of a 60-year-old beaver dam floods a downstream meadow  best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem

It cause immense damage to the property, habitats due to water flooding over them.

What is a dam?A dam is a barrier that stops or restrict the flow of surface water or underground streams.It is build across the stream or river to hold water back.It can used to store water, control floods and generate electricity.

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The term ____ refers to anatomical structures that are found on the same side of the body.

A. Contramedial
B. Bilateral
C. Contralateral
D. Ipsilateral

Answers

Answer:

D. Ipsilateral

Explanation:

Ipsilateral is the occurrence of anatomical structures like the muscles, body organs, parts, etc., on the same side of the body. Thus, option D best fits the blank.

What is Ipsilateral?

Ipsilateral is an anatomical terminology that defines the position, regions, and body structures that lie or occur on the same side of the body. On contrary, contralateral defines the structures on the opposite side of the body.

Bilateral is an anatomical term that refers to the anatomical structures that are present on the left and right side of the body and affects both sides. It defines the symmetry of the body.

Therefore, the Ipsilateral refers to structures of the same side.

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Which base is found in RNA but not in DNA:
O guanine
O uracil
O adenine
O cytosine

Answers

Answer:

Uracil

Explanation:

Scientists are uncertain about the reasons for the dodo’s extinction.
Suggest an explanation for this uncertainty.

Answers

There were few records kept about the dodo birds.

Write the definition of evaporation.
Wrong answer will be reported.
pls Quick!

Answers

Answer:

hope it helps

Explanation:

evaporation is the process of a liquid changing from liquid to gas and can happen in a small and large scale :)

Answer:

The changing of a liquid into vapours or gas is called evaporation. Evaporation is used to obtain a solid substance that has dissolved in water or any other liquid. The dissolved substance is left as a solid residue when all the water has evaporated.

Which of the following is true about the sugar molecules in plants

1. The sugar molecules are made by plants

2. The sugar molecules come from the soil

3. The sugar molecules are one of many sources of food for plants

4. The sugar molecules are made from molecules of water and minerals

Answers

Answer 1)

Not 2 bc they don’t come from the soil, they are made by plants through photosynthesis.

Not 3 bc I’m pretty sure sugar is not the only source of food for plants.

Not 4, I’m not exactly sure why not 4, but my gut is saying 1.

Sorry the explanation is not super helpful.

The sugar molecules are made by plants during photosynthesis.

How sugar molecules in plant are made?

Plants are autotrophic in nutrition. During photosynthesis, using water sunlight is converted into energy and sugar molecule  like glucose within the plant cells.

Plants store excess glucose in form of starch (polyglucan).

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Morgan and his fruit flies are famous for two discoveries. What are they and how do they help us in understanding genetics?

Answers

Thomas Hunt Morgan, who studied fruit flies, provided the first strong confirmation of the chromosome theory. Morgan discovered a mutation that affected fly eye color. ... Based on the inheritance pattern, Morgan concluded that the eye color gene must be located on the X chromosome.

How the plants survive in tropical rainforest?

Answers

Answer:

The plants have adapted to the rainforest environment by growing their roots deep into the ground and extending their leaves high into the tree canopy to receive sunlight for photosynthesis. Mant plants have adapted to the immense amount or water they are exposed to in their environment.e

I like her and I scare to tell her

Answers

Answer:

just let your heart ❤out she may like you too.

Along with meats, poultry, and seafood, what food may increase your risk of food borne illness if not cooked?

Answers

Answer:

you could get very sick and believe me i have experienced it and it is not good also if yo eat to much of it you can die their is always that possibility

Explanation:

Because of it being raw so plz dont try it

Unpasteurized milk or milk products can result in food-borne illnesses.

What are foodborne illnesses?

Foods can be contaminated by a wide range of disease-causing microbes, leading to a wide range of foodborne diseases, commonly known as foodborne sickness or food poisoning.

Over 250 foodborne illnesses have been uncovered by researchers. Numerous bacteria, viruses, and parasites are to blame for the majority of them, which are infections. Foodborne illnesses can also be brought on by toxins and chemicals contaminating foods.

Foodborne illnesses frequently cause nausea, vomiting, stomach cramps, and diarrhea. The symptoms of many foodborne infections, however, may vary. Sometimes, foodborne infections can have severe symptoms, and some of them can even be fatal. A foodborne disease may affect anybody, but certain people are more susceptible to getting one.

The majority of people who contract a foodborne disease recover on their own, but those who experience severe symptoms should visit a doctor.

Therefore, unpasteurized milk or milk products can result in food-borne illnesses.

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f the daughter cell contains 24 chromosomes, how many were contained in the parent cell, for Mitosis and Meiosis?

Answers

Answer:

The answer to your question depends on whether cells are dividing after mitosis or meiosis. I will give explanations for both.

During mitosis, the nuclear content of the cells divides just prior to cytokinesis when the cell itself divides. Prior to mitosis, the DNA contained in the parent cell is...

Explanation:

KERE ON LEARNING?

Explain how food is digested in the digestive system?

Answers

As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules. The body then absorbs these smaller molecules through the walls of the small intestine into the bloodstream, which delivers them to the rest of the body.

What are the two reasons why viruses have such small genomes. (Select both correct options) Viruses have fewer genes than living organisms. Increased selection for multiple chromosomes in viruses Viruses utilize a variety of genetic material for their genome Viruses have very little non-coding DNA

Answers

Answer:

WITHDRAWN

The publisher has withdrawn permission for online, public display of this title via the NLM Literature Archive. For additional information, please contact the publisher.

Two reasons for which viruses have such small genomes include 'viruses have fewer genes than living organisms' and 'viruses have very little non-coding DNA'.

What is the genome?

The genome is all the genetic material present in the cells (either somatic or geminal cells) of an organism.

In eukaryotic organisms, the genome is big because it contains many genes required to synthesize different cellular components.

Moreover, the eukaryotic genome also contains many non-coding regions, which are laking in smaller simpler genomes.

In conclusion, two reasons for which viruses have such small genomes include 'viruses have fewer genes than living organisms' and 'viruses have very little non-coding DNA'.

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What happens to sister chromatids during mitosis

Answers

During cell division, each chromatid will separate and dwall inside one of the to daughter cells.

number of bones in vertebral column in human trunk region

Answers

Answer:

51 BONES

Explanation:

Hope it can help you lovelots

What is the important of ecological factors to organisms

Answers

Explanation:

The ecological factors that affect the growth of plants and determine the nature of plant communities are divided into three types.

The three types of ecological factors are: (1) Climatic factors which include rainfall, atmospheric humidity, wind, atmospheric gases, temperature and light (2) Physiographic factors which include altitude, effect of steepness and sunlight on vegetation and direction of slopes (3) Biotic factors which include interrelationship between different plants of a particular area, interrelationship between plants and animals occupying the same area and interrelationship between soil microorganisms and plants.

I. Climatic Factors:

The important climatic factors of a region are rainfall, atmospheric humidity, wind, temperature, and light. Of these climatic factors each one individually contributes to the general and overall effect of climate by influencing the life processes of plants which constitute the vegetation.

help now asap plssssss ols dont answer if you dont know​

Answers

Answer:

Image 1

Hope this helps, have a nice day/night! :D

If all burning of fossil fuels was stopped today, why will temperatures continue to rise? A) Fossil fuel emissions are not responsible for the enhanced greenhouse effect. B) Greenhouse gases remain in the atmosphere for many years. C) Deforestation must also be stopped in order for temperatures to decline. D) Increased methane emissions will more than make up for the difference.​

Answers

Answer:

I think it's d)

Explanation:

What's your guess?

If the burning of fossil fuels was stopped immediately, the temperature still continues to rise because of the green house gases which remain in the atmosphere for many years. Thus, the correct option is B.

What causes global warming?

Global warming is the increase in the temperature of the planet as a whole due to many factors such as burning of fossil fuels, deforestation, pollution, increase in green house gases, etc.

Global warming lead to the depletion of ozone layer and affect the air quality which can cause various diseases. If the burning of all fossil fuels was stopped today, the temperature of the planet still continues to rise because of the green house gases which remain in the atmosphere for many years. These are the heat-trapping gases.

Therefore, the correct option is B.

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The carbohydrate molecule ____
is a powerhouse energy source.


A) Glucose

B) sucrose

C) lipid

D) amino acid

Answers

Answer:

The carbohydrate molecule ____ is a powerhouse energy source.

→ A) Glucose

Which square (A, B, C, or D) represents the repeating subunit of the polymer shown? Three dots then C connected by single lines to H above and C H subscript 3 below. Then a single line to a C connected by single lines to one H each above and below. Then a single line to a C connected by single lines to H above and C H subscript 3 below. Then a single line to a C connected by single lines to one H each above and below. Then a single line to a C connected by single lines to H above and C H subscript 3 below. Then a single line to a C connected by single lines to one H each above and below. Then a single line to a C connected by single lines to H above and C H subscript 3 below. Then a single line to a C connected by single lines to one H each above and below. Then a single line to a C connected by single lines to H above and C H subscript 3 below. Then a single line to a C connected by single lines to one H each above and below. Then a single line connecting to a C connected by single lines to H above and C H subscript 3 below. Then a single line to a C connected by single lines to one H each above and below. Then three dots. A box labeled A surrounds the first C and things connected above and below. A box labeled B surrounds the fourth C and things connected above and below. A box labeled C surrounds the seventh and eighth C's and things connected above and below. A box labeled D surrounds the last 2 C's only.

Answers

Answer:

C

Explanation:

.

Answer:

C is the correct answer. look at the pic below.

Explanation:

1. Observe: Look through the descriptions of the large and small organs. A. Which of the large
organs allow nutrients and water to pass through their walls

Answers

Answer:

The small intestine and large intestine

Explanation:

The small and large intestines were designed to allow nutrients to pass through their walls.

The processes by which a molecule can be extracted and processes by which a molecule can be isolated

Answers

Answer:

Extraction is the first step to separate the desired natural products from the raw materials.

solvent extraction, distillation method, pressing and sublimation

Isolation can be achieved from polyherbal formulation but it will be rather difficult and would involve complex purification steps .

Explanation:

Have a great day!

if a plant cell and animal cell were placed in a dilute salt solution and than transferred to distilled water what will happen to the cells​

Answers

higher water concentration outside the cell to a lower water concentration inside the cell

Explanation:

water will defuse from a higher water concentration outside the cell to a lower water concentration inside the cell. Red blood cells are placed in a solution with a lower water Concentration compared to content 1.7% salt solution will lose water by the osmosis and shrink

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