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 childrens skin becomes a little bit darker after exposure to the sun. judging from this information, skin tone is probably what?
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a mendelian traita polygenic traita pleiotropic trait influenced by the environment
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Explanation:

• Polygeneic trait: Skin tone shows a range of phenotypes (from very pale to very dark) in the children of medium - skinned parents. Polygenic traits are controlled by multiple genes, which can lead to a continuous variation in phenotype, unlike Mendelian traits (controlled by a single gene with distinct dominant - recessive patterns).
• Influenced by the environment: The fact that most children’s skin becomes a little bit darker after sun exposure indicates that the environment (sunlight in this case) has an impact on the skin - tone phenotype.

Answer:

a polygenic trait, influenced by the environment