By using this site, you agree to our Privacy Policy and our Terms of Use. Close

"In-breeding is not really a problem - animal breeders do this all the time."

Actually yes it is. Animal breeders do do it and that is why, for example, pedigree dogs have a shorter life expectancy than mongrels.

See this wikipedia page to see what I mean.
http://en.wikipedia.org/wiki/Inbreeding_depression