Question

John and Pat are identical twins with identical DNA. John works in a movie theater, and Pat works as a lifeguard. They have very different skin pigmentation. Which is the best explanation of the difference? Skin color, a polygenic trait, is also determined by environmental factors. Skin color, a polygenic trait, is also determined by the sex of the individual. Skin color, a trait that demonstrates incomplete dominance, is also determined by environmental factors. Skin color, a trait that demonstrates incomplete dominance, is also determined by the sex of the individual.

Answer 1

Answer:

A. Skin color, a polygenetic trait, is also determined by environmental factors.

Explanation:

When you are a lifegaurd you are outside much more which means you are very likely to get a tan; Therefore changing the pigment of Pat's skin.

I hope this helps you :) Have a nice day!

Answer 2

The study of genes and inheritance is called genetics. In a gene pair, one allele is dominant and the other is recessive.

The correct answer is the variation in gene combination.

What is polygenic inheritance?

• A character that is controlled by more than one pair of alleles is called polygenic inheritance. The best example is skin pigmentation which is controlled by 6 alleles or 3 gene pairs.

According to the question, pigmentation is different due to the combination of the different genes. These genes produced melatonin which decides the skin tone, The dominant genes code for a darker tone, and the recessive gene code for a lighter tone.

Hence,  the correct answer is mentioned above.

For more information about the genes, refer to the link:-

https://brainly.com/question/787658