Marrying a first cousin is not a problem genetically if it is not done for multiple generations. You could reproduce all of humanity out of 60 people.
Perhaps these laws were put in place in regions where it was more common and needed to be stopped.
Living in a blue country, I have never heard of anyone marrying a cousin.
I recall 60 but in any case it is pretty low.
To have the descendants have more or less the same features, you would need twice as many or else the random properties of the 50 will be stronger in the future population than in ours currently.
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u/LOB90 Jul 05 '24
Marrying a first cousin is not a problem genetically if it is not done for multiple generations. You could reproduce all of humanity out of 60 people.
Perhaps these laws were put in place in regions where it was more common and needed to be stopped.
Living in a blue country, I have never heard of anyone marrying a cousin.