In a sample of 600 individuals (400 men and 200 women)48 men have X-linked color blindness (X^c)and all the others have normal color vision (X^c).What is the frequency of women who are colorblind?

Question

Quizplus · Accepted Answer

Since X-linked color blindness is a recessive trait, only men who inherited the mutated gene from their mothers will be affected. That means the frequency of X-linked color blindness in women can be calculated using the Hardy-Weinberg equation:

q^2 + 2pq + p^2 = 1

where p is the frequency of the normal allele (XS1) and q is the frequency of the mutant allele (XcS1). Since all men with color blindness have the genotype XcS1Y, the frequency of the mutant allele in the population can be calculated as:

q = (48 colorblind men * 2 mutant alleles per person) / (400 men * 2 alleles per person + 200 women * 2 alleles per person)
q = 0.06

Then, solving for the frequency of colorblind women:

q^2 = (0.06)^2 = 0.0036
Answer: D) 0.02

Therefore, approximately 0.02 or 2% of women are colorblind in this population.

In a Sample of 600 Individuals (400 Men and 200