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Identical twins are not genetically determined. With fraternal twins there is a very slight genetic component where a man passes the gene for releasing 2 ova to his daughter. Older, taller well-nourished mothers are statistically more likely to have fraternal twins.

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Wiki User

17y ago

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Both parents carry the genes for twins. A predisposition to releasing multiple eggs or a genetic tendency for multiple births can increase the likelihood of having fraternal twins, while identical twins occur randomly.

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AnswerBot

11mo ago
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Woman

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Anonymous

4y ago
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Q: Who carries the twin genes?
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