Jack and Jill are twins. Because he is a boy, Jack's parents encourage him to run. However, they discourage Jill from engaging in athletic activity. As a result, Jack is much faster at running up a hill than Jill. The difference in Jack and Jill's behavior is best explained by __________. A) nonshared environmental influences. B) active gene-environment relations. C) polygenic effects. D) niche-picking.
Added by Nancy R.
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In this case, Jack and Jill are both being influenced by their parents' encouragement or discouragement, so this is not a nonshared environmental influence. B) Active gene-environment relations: This refers to the idea that individuals with certain genetic Show more…
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