Which of the following does not characterize identical twins in mammals?
A) They are formed either during cleavage or in the early blastula stage.
B) They are described as monozygotic.
C) Blastomeres physically separate into two groups.
D) They have a 50 percent chance of being the same sex.
E) When separation of inner cell mass is incomplete, conjoined twins result.
Correct Answer:
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