Aside from the “master switch gene,” SRY, the Y chromosome (only found in men) contains very few other genes. And it’s the only chromosome not necessary for life. Right now, it’s in a state of degeneration, shriveling up for males. This degeneration has occurred because the Y chromosome is only ever present in one copy, passed from fathers to son, meaning there’s no chance to …
We Are Evolving Away From The Y Chromosome