◉ BioQuestAP BIOLOGY
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EXPEDITION 8 / 8 · COLLEGE BOARD UNIT 7

Natural Selection

Variation, selection, and population change

Your pace. Your study mode.75 flashcards · 20 MCQs

EXPLORE & EXPERIMENT

Predict genotype frequencies

Move allele frequency p and inspect Hardy–Weinberg expectations. Observe where heterozygotes are most common.

Expected genotype frequency

Predict genotype frequencies00.250.50.75100.250.50.751Frequency of allele A (p)

━━ Aa┄ AA┈ aa

AA 25.0% · Aa 50.0% · aa 25.0%
Model & assumptions

p + q = 1; p² + 2pq + q² = 1

Hardy–Weinberg expectations: large population, random mating, no selection, mutation, or migration. These curves do not simulate evolution over time.

Original BioQuest teaching models. Explore the OpenStax Biology reference. Gene regulation · Oxidative phosphorylation