Yes. I know incest is wrong, but, why do the children end up deformed? I know it has to do with the DNA being too similar but what exactly happens
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Now incest does not automatically mean deformity and however among all the thousands of genes in the 26 chromosomes, almost *everybody* has a bad gene or two. Most of the time, this isn't a problem because the *other* chromosome is fine and has a good copy, and most of the bad mutations are fairly rare, so the chances of marrying some random person who also has the bad gene is very low.
The problem when you start marrying relatives and having children in them is that the chances go *way* up that if *you* have a bad copy of a gene, the other person does too. For instance, most of the royal families in Europe are related, so everybody is each other's second cousin, if not closer. The end result was that a *lot* of royal children got born with hemophilia because their father got the bad gene from his great-grandfather, and the mother got it from her great--grandfather, because it was the same guy.
The problem when you start marrying relatives and having children in them is that the chances go *way* up that if *you* have a bad copy of a gene, the other person does too. For instance, most of the royal families in Europe are related, so everybody is each other's second cousin, if not closer. The end result was that a *lot* of royal children got born with hemophilia because their father got the bad gene from his great-grandfather, and the mother got it from her great--grandfather, because it was the same guy.
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The human body is made up of 12 different chromosome 1/2 from the dad 1/2 from the mom when incest is involved and like u said there to similar and you end up with an extra chromosome