When concordance rates are higher among monozygotic twins than dizygotic twins, this indicates which of the following?
A.	There is partially a genetic basis.
B.	There is partially an environmental basis.
C.	There is a 100% environmental cause.
D.	There is a 100% genetic cause.
Answer:A
When concordance rates are higher among monozygotic twins than dizygotic twins, this indicates which of the following?
A.	There is partially a genetic basis. B.	There is partially an environmental basis. C.	There is a 100% environmental cause. D.	There is a 100% genetic cause.