> During a single reproduction, there are tons of genetic and epigenetic variables that could be selected for, which determine different things. Why would a specific feature in a specific part of the body, that provides merely a minor improvement at any given time, come to completely replace all other genotype expressions?
As far as I understand it, sexual reproduction with its gene shuffling allows all features to evolve simultaneously. So the genes for the anorectal angle are constantly selected across the whole population in parallel with every other gene.
As far as I understand it, sexual reproduction with its gene shuffling allows all features to evolve simultaneously. So the genes for the anorectal angle are constantly selected across the whole population in parallel with every other gene.