Identical twins --> monozygotic Twins
identical twins, twins which are the result of a single zygote (fertilized egg) splitting into two cell masses and becoming two individuals. The twins are genetically identical and are always of the same sex (both males or both females).
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... to get a new species. The genomes of humans and chimps are virtually identical in the genes that they contain, and there are no "chimp genes" ... two individuals will ever be genetically identical (except monozygotic twins). So, bad alleles, over time, tend to be slowly (sometimes quickly ...
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