A couple has twins. One is a boy and one is a girl. How do you know what kind of twins they are?

1 Answer
Mandira P.
Feb 6, 2017

The twins are fraternal.

Explanation:

Identical twins are obviously of same sex, because they start their life from single zygote.

Fraternal twins can be of different sex, because they arise from two different fertilised eggs. Fraternal twins are siblings who happen to share the womb.

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