AP BIOLOGY

EVOLUTION

HARDY WEINBERG EQUILIBRIUM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A population of 150 individuals has an allele frequency of 0.7 for the recessive allele. Use the Hardy-Weinberg equation to determine the heterozygous genotype frequency.
A
0.09
B
0.42
C
0.49
D
0.21
Explanation: 

Detailed explanation-1: -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.

Detailed explanation-2: -To compute the frequency of recessive alleles, use the Hardy-Weinberg equilibrium equation. The recessive allele’s frequency is denoted by q, and it can be computed by taking the square root of q2.

Detailed explanation-3: -Since 30% will have the recessive allele, then in a population of 200 organisms, there will be 200⋅30%=60 who will have the recessive allele.

Detailed explanation-4: -To know if a population is in Hardy-Weinberg Equilibrium scientists have to observe at least two generations. If the allele frequencies are the same for both generations then the population is in Hardy-Weinberg Equilibrium.

There is 1 question to complete.