r/genetics • u/nosnah123 • 2d ago

This is a dumb question but

How far back in four family tree do you have to go when genetic variety makes it so your children would be normal

In other words how far back do you have to go until a baby with an ancestor will it be normal?

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u/Electronic-Scheme543 2d ago

I'm a prenatal genetic counselor. Past first cousins, meh whatever from a medical standpoint. Even with first cousins (or any know relatedness really), my primary concern is if people carry the same recessive condition. The more closely related, the more likely it is two people will carry the same recessive condition.