A bell curve is characteristic of the distribution of phenotypes of a multifactorial trait because
A. most people are average for the trait.
B. the phenotypes at the ends of the curve correspond to fewer genotypes than the phenotypes at the middle of the distribution.
C. the phenotypes in the middle of the curve correspond to fewer genotypes than the phenotypes at the ends of the distribution.
D. people at the extreme ends of the distribution do not survive to reproduce.
Answer: B
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