Im talking about humans.
What about animals?
In: Biology
Every child inherits lots of little genetic problems from their mom and another set of little genetic problems from their dad. But they’re really spread out, so for every little problem one parent gives you, your other parent’s genes probably provide a healthy version. So we’re usually able to withstand stuff like that without much problem.
If your mom and dad are closely related, it’s much more likely you’ll be getting a lot of the SAME little genetic problems from your mom and your dad. Which would mean you’d have no healthy versions to make it okay.
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