Using Identical Twins to Study Heritability Is Complicated by the Fact

Multiple Choice

Using identical twins to study heritability is complicated by the fact that:

A) identical twins often experience identical uterine environments, whereas fraternal twins do not.
B) identical twins are often treated more similarly to one another than are fraternal twins.
C) fraternal twins often share the same uterine environment, whereas identical twins do not.
D) identical twins often experience a more similar uterine environment and more similar treatment during childhood than do fraternal twins.
E) even identical twins are sometimes genetically different from one another.