Which of the following statements BEST reflects the extent to which we can distinguish the effects of genes and the environment on the expression of a complex trait?
A)About 80% of an individual's height is determined by genes and 20% by environment.
B)For identical twins raised in the same environment, height should not differ by more than 20%.
C)In a group of individuals of the same sex, about 80% of the variation in height among individuals is due to genetic differences and 20% is due to environmental differences.
D)If one individual is 60 inches tall and another is 70 inches tall, they differ in about 80% of their genes.
E)None of answer options is correct.

Question

Quizplus · Accepted Answer

The statement reflects that the variation in height among individuals of the same sex is mostly due to genetic differences (80%) and 20% is due to environmental differences. This suggests that while genes play a significant role in determining height, the environment also has an impact. Option A is too simplistic, and option B assumes that environmental factors do not play a role in height differences between identical twins raised in the same environment. Option D is incorrect as it suggests that height differences are determined by genes alone, which is not true. Option E is not a valid answer.

Which of the Following Statements BEST Reflects the Extent to Which