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Formation Of Identical Twins

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Which of the following best explains how Elisa conceived identical twins?
A

A single egg was fertilized and split into two after the embryo developed.

B

Two separate eggs were fertilized by different sperm and implanted into the uterus at different times.

C

A single egg was fertilized and split into two before the embryo developed.

D

Two eggs were fertilized by the same sperm and implanted into the uterus simultaneously.

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