AP BIOLOGY

EVOLUTION

HARDY WEINBERG EQUILIBRIUM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If four percent of a population shows a recessive trait, which of the following statements are true?
A
The frequency of carriers in the population is 32%
B
The frequency of individuals showing the dominant trait is 96%
C
The frequency of heterozygous individuals in the population is 36%
Explanation: 

Detailed explanation-1: -Examples of Recessive Traits Cleft chin, dimples, and freckles are similar examples; individuals with recessive alleles for a cleft chin, dimples, or freckles do not have these traits. Having round (as opposed to almond-shaped) eyes is recessive, along with inability to roll one’s tongue.

Detailed explanation-2: -Frequency of recessive allele is 0.2.

Detailed explanation-3: -In the question, the genotype frequency of recessive population is (q2) = (16% or 0.16). Hence, frequency of recessive allele = q = 0.16 = 0.4. Since p+q = 1; thus the frequency of dominant allele = p = 1-q = 1-0.4 = 0.60.

Detailed explanation-4: -But the frequency of a recessive trait is always smaller than that of a dominant trait. So the answer to this one is false. Whether or not aid rates is dominant does not determine if it’s rare or common.

There is 1 question to complete.