"The human Y chromosome has not lost any genes since the divergence of humans and chimpanzees between 6–7 million years ago. Additionally, a scientific report i

"The human Y chromosome has not lost any genes since the divergence of humans and chimpanzees between 6–7 million years ago. Additionally, a scientific report in 2012 stated that only one gene had been lost since humans diverged from the rhesus macaque 25 million years ago." -- WP TLDR the human Y is not shrinking