A Trait of Adopted Children Resembled That of Their Birth

question 213

Multiple Choice

A trait of adopted children resembled that of their birth parents more than of their adoptive parents. This suggests that

• A)heritability for the trait is high.
• B)heritability is moderate.
• C)heritability is low.
• D)heritability cannot be estimated.

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Definitions:

Frequency-Dependent Selection

Natural selection in which a trait’s adaptive value depends on its frequency among members of a population.

Recessive Allele

An allele that produces its characteristic phenotype only when its paired allele is identical, often masked by a dominant allele in a heterozygote.

Dominant Allele

An allele that expresses its phenotype even in the presence of a recessive allele within a diploid organism.

Hardy-Weinberg Law

The Hardy-Weinberg Law is a principle that predicts the genetic variation and allele frequencies will remain constant in a population from generation to generation, assuming no evolutionary influences affect them.