The e4 allele is common in the world population (14.5% of people are carriers) despite being a risk factor for Alzheimer's disease. Which idea best explains this?

Question

Quizplus · Accepted Answer

Antagonistic pleiotropy refers to a gene that has multiple effects, including at least one beneficial and one detrimental. The e4 allele of the APOE gene, associated with an increased risk of Alzheimer's disease, may confer some advantages earlier in life or under different environmental conditions, which explains its prevalence despite its negative effects in old age.

The E4 Allele Is Common in the World Population (14