5
If the frequency of the dominant allele (p) in a population is 0.7, what is the frequency of the heterozygous genotype (Aa)
according to the Hardy-Weinberg equilibrium?
EXPLANATION
Population Genetics
- Hardy-Weinberg Formula:
- For a diallelic locus with alleles $A$ and $a$:
- Calculation:
- Given dominant allele frequency: $p = 0.7$
- Recessive allele frequency:
- Frequency of heterozygous genotype ($Aa$):
- nalysis:
- (0.42): Correct.
- (0.21): Represents $pq$ without multiplying by 2.
- (0.49): Represents homozygous dominant frequency ($p^2 = 0.7^2$).
Correct option: (2) 0.42
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