Researchers made the find using an algorithm that purportedly distinguishes between mutations that were selected for and those that came along for the ride by coincidence, a feat that has long eluded scientists.
For two decades, scientists struggled to fully sequence the Y chromosome. Finally, researchers have mapped its full length thanks to recent advances in sequencing technology.
Mammals that give birth to live young may have evolved to make use of the remnants of viruses in their genomes to ward off pathogens, a study suggests.