If a specific trait that is found in one member of a set of identical twins is found in the other 90 percent of the time,yet is found less than 25 percent of the time in both members of sets of nonidentical twins,we would conclude that the environment:
A)was the major cause of the trait
B)played a relatively great role in determining the trait
C)was as important as the genotype in determining the trait
D)played a relatively minor role in determining the trait

Question

Quizplus · Accepted Answer

The high concordance rate (90%) for identical twins compared to a much lower rate (<25%) for nonidentical twins suggests that genetic factors are more influential than environmental factors for the trait in question, indicating that the environment plays a relatively minor role.

If a Specific Trait That Is Found in One Member