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

question 29

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.