Sixty years of data from the Framingham Heart Study showed that people with low cholesterol had 50% more offspring, on average, than those with high cholesterol. Since it is known that cholesterol level is highly heritable, what can be concluded from this specific observation?
A. High cholesterol reduces an individual's fertility.
B. The frequency of people with low cholesterol should increase in the U.S. population.
C. Cholesterol level has a major effect on survival.
D. Natural selection is largely nullified as an important evolutionary mechanism in modern human populations.
E. Ethnic groups that traditionally have more children have a greater frequency of genes for low cholesterol.
Answer: B. The frequency of people with low cholesterol should increase in the U.S. population.
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