AP BIOLOGY

EVOLUTION

HARDY WEINBERG EQUILIBRIUM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If there are 400 red flowers, 200 pink flowers, and 100 white flowers. Solve for the frequency of the recessive allele.
A
0.28
B
0.14
C
0.38
D
0.42
Explanation: 

Detailed explanation-1: -To determine q, which is the frequency of the recessive allele in the population, simply take the square root of q2 which works out to be 0.632 (i.e. 0.632 x 0.632 = 0.4). So, q = 0.63. Since p + q = 1, then p must be 1-0.63 = 0.37.

Detailed explanation-2: -It’s more simple than that. One in four alleles is the dominant one therefore p=25% or 0.25. Three in four alleles is the recessive one so q=75% or 0.75. The total is 100% or 1, therefore for a gene with two alleles, p+q=1 always.

Detailed explanation-3: -We know that the frequency of the recessive homozygote genotype is q2 and equal to 0.09.

There is 1 question to complete.