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ra1l [238]
3 years ago
10

Human skin color varies widely around the world, and children do not always exhibit the exact same coloring as their parents. Ba

sed on this information, what is true about human skin color?
A.Skin color is not a genetic trait.
B.A single pair of alleles controls this trait.
C.It’s an example of incomplete dominance.
D.It’s an example of polygenic inheritance.
Biology
2 answers:
Alina [70]3 years ago
7 0
D, it is polygenetic inheritance. <span />
Mnenie [13.5K]3 years ago
5 0

Answer:

D.It’s an example of polygenic inheritance.

Explanation:

Polygenic inheritance occurs when more than one gene regulate single genetic trait. Human skin color is regulated by more than one gene and follows quantitative inheritance wherein total number of dominant alleles of all genes determine the skin color. Formation of various gene combinations by multiple genes regulating the skin color results in world wide variation of the trait as well as variations of skin color between parent and progeny.

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dem82 [27]

Hey there! :D

When we are talking about gametes, we can use a punnet square, or in this case, common knowledge. If two of the alleles for one phenotype are the same, we can infer there will only be two variations of the genotype. (because there are two dominant SS genes) We already know that "D" must be the answer. Firstly, there will be one allele for each gene, so there will always be an "S" and a "T" no "SS" or "tt" (when talking about gametes). That leaves us with B and D but there is no recessive "s" in the original genotype, so the answer must be "D".

I hope this helps!

~kaikers

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