john and pat are identical twins with identical dna. john works in a movie theater, and pat works as a…

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.

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

Brief Explanations:

Skin color is a polygenic trait (controlled by multiple genes). Identical - twins have the same genes. Since John and Pat have different skin pigmentation despite identical DNA, environmental factors (John in a movie - theater with less sun exposure, Pat as a lifeguard with more sun exposure) play a role. Skin color is not determined by sex in this context and it is a polygenic not incomplete - dominance trait.

Answer:

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