Modern humans evolved a ‘selfish’ X chromosome after Africa exodus

The chromosome might include areas that promote their DNA’s unfold by killing sperm that carry Y chromosomes. However, Y chromosomes might have advanced counter mechanisms over time

By Michael Le Page

Around 50,000 years in the past, a brand new X chromosome seems to have been launched into fashionable people that had not lengthy left Africa.

There was most likely exceptionally robust choice for components of this chromosome as a result of, at this time, most individuals of less-recent African ancestry have inherited these areas.

Kasper Munch Terkelsen at Aarhus University in Denmark, who led the analysis, thinks these areas might include bits of so-called egocentric DNA that promote their …