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valina [46]
3 years ago
14

HELPPPPP PLEASEEEE ITS DUE IN LESS THAN 20 MINUTES PLEASEEE!!

Biology
1 answer:
erastovalidia [21]3 years ago
5 0

Answer:

Figure A, I hope I helped you

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Explain the genotypes and phenotypes of skin color. Summarize the relationship between the number of active genes and the color
kotegsom [21]

Human skin color is a polygenic trait, which means that multiple gene loci (with different alleles) are involved in its expression. It has been shown that there more than 350 genetic loci involved in determining skin color. Because of that, there is the enormous number of possible genotypes for the skin color and as a result, the phenotypes vary from the darkest brown to the lightest hues. Different populations have different allele frequencies of genes for human skin color, and the combination of these allele variations brings about complex and continuous variation in skin coloration. Natural skin color can change due to exposure to sunlight (becomes darker) and that is the way it adapts to intense sunlight irradiation (protection against the UV exposure).

plz mark as brainlist

4 0
3 years ago
Why are chromosomes important to mitosis?
igor_vitrenko [27]

Answer:

The daughter cells need a copy of every chromosome in order to replicate and separate.

Explanation:

Cells have to replicate their genetic material to make a whole other cell. Before mitosis the cells need this step for mitosis.

6 0
3 years ago
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Which of the following best explains why humans need constant supplies of fresh water? a. Humans need a constant supply of water
alina1380 [7]

Answer:

C. Constant supplies of freshwater are needed because body water is continually being lost.

8 0
3 years ago
15. If a person feels pressure on her bladder, then she is experiencing -
Nutka1998 [239]
D to release external waste.
6 0
3 years ago
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Individuals producing an abnormal form of the extracellular matrix protein, fibrillin, is a result of ______.
erastova [34]

Answer:

Indivisuals with producing an abnormal form of extracellular protein fibrillin are suffering from Marfan syndrome ehich is caused by genetic mutation in the FBN1 gene.

Explanation:

Gene mutations in FBN1 gene results in the production of an abnormal extracellular matrix fibrillin-1 protein that cannot function properly. These gene mutations basically reduce the amount of fibrillin-1 produced by the cell, alter the structure of fibrillin-1, or causes the impairment of the transport of fibrillin-1 out of the cell.

As a result, protein is poorly incorporated into extracellular matrix. Hence, indivisuals with Marfan syndrome present following symptoms

Tall stature.

Disproportionately long arms, legs and fingers.

Sternum either protrudes outward or dips inward.

Arched palate and crowded teeth.

Heart murmurs.

Extreme nearsightedness.

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3 years ago
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