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

AP Biologymediummcq1 pt

A species' population drops to 20 individuals, then rebounds. The rebounded population likely shows

A.reduced genetic diversity from the bottleneck

B.greater diversity than before the crash

C.exactly the original allele frequencies

D.a new species immediately

Explanation

Core Concept

The survivors' alleles — however unrepresentative — become the new gene pool, and rare alleles are often lost entirely.

Correct Answer

Areduced genetic diversity from the bottleneck

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