About _____ of the variation in age of puberty is determined by genes.
A) one-half
B) two-thirds
C) one-fourth
D) three-fourths

Name: About _____ of the variation in age of puberty is determined by genes. A) one-half B) two-thirds C) one-fourth D) three-fourths
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Question

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Research has shown that approximately two-thirds of the variation in age of puberty can be attributed to genetic factors. Environmental factors such as nutrition and stress can also play a role.

About _____ of the Variation in Age of Puberty Is