[Ed. – Democrats must be rejoicing.]
The Y chromosome could be dying out, prompting discussion of whether men could disappear with it.
A person’s sex is determined by whether they have two X chromosomes (which causes ovaries to develop) or an X and a Y (which results in testes).
Of the two, X has approximately 1,000 genes while Y has just 45 and research suggests the Y chromosome is gradually shrinking even further.
Genes develop mutations over time, some of which are harmful. Chromosome can avoid passing on such harmful mutations by mixing and matching with each other during meiosis — the stage of foetal development during which our forming bodies develop sperm or eggs.
This process breaks up the genes and makes it more likely that only strong, non-harmful ones get passed on.