Apentix/AP Biology/Unit 7: Natural Selection/Question
AP Biologymediummcq1 pt

Observed genotype frequencies in a population differ significantly from Hardy–Weinberg expectations. Which conclusion is most defensible from that observation alone?

A.The Hardy–Weinberg equations are mathematically invalid for this population
B.At least one H–W assumption is violated; the cause remains unknown
C.Natural selection must be responsible for the observed deviation
D.Allele frequencies must already have changed since the previous generation

Explanation

Core Concept

Hardy–Weinberg equilibrium is a null model. A significant departure from its expected genotype frequencies indicates that one or more assumptions are violated, but additional data are required to determine whether selection, drift, migration, mutation, nonrandom mating, or another factor is responsible.

Correct Answer

BAt least one H–W assumption is violated; the cause remains unknown

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