The H2 haplotype on chromosome 17 occurs in about 21% of European women.Why is natural selection strongly implicated?
A)H2 women are infertile.
B)H2 women have 3.5% more children than do non-H2 women.
C)H2 women have 25% more children than do non-H2 women.
D)H2 women suffer from high rates of tuberculosis.

Question

Quizplus · Accepted Answer

Natural selection is strongly implicated because the H2 haplotype is more common in European women, suggesting that it provides some sort of reproductive advantage. Choice B provides evidence for this advantage, as H2 women have 3.5% more children than non-H2 women. The other choices are not supported by the given information, as there is no indication that H2 women are infertile or suffer from tuberculosis, and the reported increase in children for H2 women is only 3.5%, not 25%.

The H2 Haplotype on Chromosome 17 Occurs in About 21