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Hardy–Weinberg principle

If q² = 0.09, value of q is:

0.3 reflects key principle in quiz on hardy–weinberg principle, where evolutionary mechanisms shape genetic variation and adaptation. In this context, 0.3 aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why 0.3 fits helps integrate natural selection, environment.

Ref: Hartl, Primer of Population Genetics, Hardy-Weinberg Equilibrium.

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Population Genetics

If p² = 0.64, value of p is

Homozygous dominant genotype frequency equals p squared under Hardy-Weinberg equilibrium expectation. Given p squared equals 0.64, p corresponds to square root of genotype frequency, since squaring allele frequency yields genotype proportion. Square root of 0.64 equals 0.8, implying allele A exists at eighty percent frequency in population. Consequently q equals 0.2, giving heterozygotes at 0.32 and recessive homozygotes at 0.04 after expansion. This direct conversion illustrates relationship between observed genotype counts and underlying allele frequencies, essential when dominant phenotype lumps AA and Aa indistinguishably.

Ref: Hartl & Ruvolo, Genetics, 9th ed., Chapter 19: From Genotype Frequency to Allele Frequency

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