It is a reasonable assumption that the other genomes involved in human development are selected for as well, but don't drastically multiply the overall complexi

It is a reasonable assumption that the other genomes involved in human development are selected for as well, but don't drastically multiply the overall complexity of humans and especially not for the brain's design. Thus the issue is still how complex extra-genomic data is such as the preexisting cells which actuate DNA, which is what I addressed.