Your Text Reveals That If One Identical Twin Is Gay,there

Multiple Choice

Your text reveals that if one identical twin is gay,there is almost a 50 percent chance that the other identical twin will also be gay.On the other hand,if a fraternal twin is schizophrenic,there is only about a 20 percent chance the other fraternal twin will be schizophrenic.The measure of likelihood that twins will share this mental illness in common is called a(n)

A) concordance rate.
B) correlation coefficient.
C) dominant trait.
D) heritability factor.