Question

two people of medium skin tone have five children, each with a different skin tone ranging from very pale to very dark. most of the children’s skin becomes a little bit darker after exposure to the sun. judging from this information, skin tone is probably what? correct answer(s) influenced by the environment a mendelian trait a polygenic trait a pleiotropic trait

Explanation:

1. Polygenic trait: Multiple genes contribute to skin - tone variation, explaining different skin tones among children of medium - toned parents.
2. Environment influence: Skin becoming darker after sun exposure shows environmental impact on skin tone. Mendelian traits are controlled by a single gene and don't explain the wide range here. Pleiotropic traits affect multiple, seemingly unrelated characteristics, which isn't relevant for skin tone in this context.

Answer:

influenced by the environment, a polygenic trait