A member asked:

Why do some twins look alike and others dont?

A doctor has provided 1 answer

Not identical: Twins may be identical or fraternal. Identical twins share the same genetic material because the egg split into two fetuses; fraternal twins come from two separate eggs which are fertilized at the same time. Theoretically, they might not even share the same father!

Answered 7/5/2012

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Are twins hereditary?

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