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We’re talking natural selection here, not genetic engineering, or invitro fertilization, or even nongenetic preferential selection. Anomolies tend to either adapt or disappear in a small timeframe. Until I see the first human asexually reproduce, it isn’t going to happen with the DNA we have.

Genetic engineering IS now a part of our own natural selection. Just like tools, boats, mathematics, etc shaped the evolution of man in prehistory. For example, man was smart enough to tame fire for cooking which led to the massive expansion of our brains.

Yes, it does take two sets of human DNA to produce a unique offspring but those two humans need NOT be of the opposite sex when genetic engineering is used. In fact, the DNA of two males can be joined in a lab and produce a female egg. Female DNA can only result in female eggs.

Also, it IS possible for humans to reproduce 100% asexually with genetic engineering (aka cloning). Asexual meaning only one individual’s DNA is used. It is possible for a female to give birth to a copy of herself...