In a study of twins,a researcher finds that 40 percent of dizygotic (DZ)twins and 40 percent of monozygotic (MZ)twins share a trait.What is the researcher most likely to conclude about the trait?

Question

Quizplus · Accepted Answer

Since both dizygotic (DZ) twins, who share about 50% of their genes, and monozygotic (MZ) twins, who share nearly 100% of their genes, have the same 40% rate of sharing a trait, it suggests that the trait is not primarily determined by genetics. If the trait were genetically determined, we would expect a higher concordance rate in MZ twins compared to DZ twins.

In a Study of Twins,a Researcher Finds That 40 Percent