Biology / Unit 8 Bio 1741 short lesson, about 20 seconds
Hardy-Weinberg Equilibrium
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The idea
Hardy-Weinberg equilibrium describes a population whose allele and genotype frequencies stay constant across generations because no evolutionary force is acting on it.
In practice
A population whose measured allele frequencies match Hardy-Weinberg's predicted values, generation after generation, is not currently evolving at that locus.
Where people slip
Hardy-Weinberg equilibrium is a theoretical baseline for comparison, not a claim that any real population is actually non-evolving.
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