The Mysterious Disappearance of Neanderthal Y Chromosome

In this video we discuss why Neanderthal Y chromosomes are missing in modern human DNA. Scientists suggest this absence could be due to random genetic drift or incompatibility between Neanderthal Y chromosomes and Homo sapiens' immune systems. Incompatibilities may have caused miscarriages of male hybrids, preventing the Y chromosome from being passed on. Another theory is that harmful mutations accumulated in the smaller Neanderthal populations, leading to the natural selection of modern human DNA when the two species interbred.