The reason why women are more robust appears to be microRNAs - short strands of RNA encoded on the chromosome, scientists believe.
Recently, the researchers harvested more DNA from European Neanderthal fossils, putting together very detailed reconstructions of a single chromosome, Chromosome 21.
The team analyzed DNA from all the chromosomes in the cell nucleus, from the Y chromosome specifically, found only in males, and from mitochondria, cellular energy machines outside the nucleus that are inherited from the mother.
If you flirt like crazy withevery Y chromosome you encounter, it loses its effectiveness, and makes you seem "not very choosy.
