# AP BIOLOGY

## EVOLUTION

### HARDY WEINBERG EQUILIBRIUM

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which Hardy-Weinberg factor represents individuals expressing the dominant phenotype in a population?
 A p2 B 2pq C q2 D p2 + 2pq
Explanation:

Detailed explanation-1: -So, the correct answer is ‘p2’.

Detailed explanation-2: -In the equation, p2 represents the frequency of the homozygous genotype AA, q2 represents the frequency of the homozygous genotype aa, and 2pq represents the frequency of the heterozygous genotype Aa.

Detailed explanation-3: -The Hardy-Weinberg Equation p = the frequency of the dominant allele in a population. q = the frequency of the recessive allele in a population. 2 p q 2pq 2pq = the frequency of the heterozygous dominant genotype. p2 = the frequency of homozygous dominant genotype.

Detailed explanation-4: -The Hardy-Weinberg equation used to determine genotype frequencies is: p2 + 2pq + q2 = 1. Where ‘p2’ represents the frequency of the homozygous dominant genotype (AA), ‘2pq’ the frequency of the heterozygous genotype (Aa) and ‘q2’ the frequency of the homozygous recessive genotype (aa).

Detailed explanation-5: -Similarly, the frequency of aa is q 2 and that of Aa is 2pq. p 2 + 2pq+q 2 ) = 1, where p 2 represents the frequency of homozygous dominant genotype, 2pq represents the frequency of the heterozygous genotype and q 2 represents the frequency of the homozygous recessive.

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