An extensive study was conducted on identical twins who were separated at birth.Among other things,the study showed that the individual from each pair who received better nutrition during childhood tended to score higher on standardized intelligence tests.This can best be described as an example of how
A)mutation alters phenotype.
B)environment alters phenotype.
C)environment alters genotype.
D)mutation alters genotype.
E)pleiotropic genes affect more than one trait.

Question

Quizplus · Accepted Answer

The study showed that the individual who received better nutrition (an environmental factor) during childhood tended to score higher on standardized intelligence tests. This demonstrates how the environment can alter the phenotype (expression of traits) of an individual.

An Extensive Study Was Conducted on Identical Twins Who Were