Bill and his sister Ann are twins; however,they cannot be:
A) monozygotic twins
B) dizygotic twins
C) fraternal twins
D) raised apart

Name: Bill and his sister Ann are twins; however,they cannot be: A) monozygotic twins B) dizygotic twins C) fraternal twins D) raised apart
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Question

Quizplus · Accepted Answer

Monozygotic twins are identical twins that result from a single fertilized egg splitting into two, and they are always of the same sex. Since Bill and Ann are of different sexes, they cannot be monozygotic twins.

Bill and His Sister Ann Are Twins; However,they Cannot Be