Question

Monozygotic (MZ) twins share ________ percent of the genes that vary across individuals, and dizygotic (DZ) twins share, on average, ________ percent of the genes that vary across individuals.

Answer 1

100 %

50 %

Step-by-step explanation:

A monozygotic twin pair is produced by fertilization of a single egg by a single sperms and then dividing into two individual fertilized eggs. A dizygotic twin pair is produced when two individual eggs are fertilized by two individual sperms. This is reason why monozygotic twins are exact copies of each other while dizygotic twins share only half of their traits.