A population is under Hardy Weinberg equilibrium. If the gene frequency of A1 allele in parents is 0.30, the frequency of A2A2 genotype in progeny will be:
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Always identify which allele frequency is given first.
If the frequency of one allele is \( x \), the other is \( 1 - x \).
The homozygous genotype frequency for the second allele is \( (1-x)^2 \).