Y chromosome

(Photo by John Moore/Getty Images)

Study: Men Who Smoke Have Missing Male Chromosomes

A new study has found that men who smoke cigarettes have missing male chromosomes.


File photo of a scientist looking at sperm under a microscope. (Photo by GEORGES GOBET/AFP/Getty Images)

Only 2 Genes From Y Chromosome Needed For Male Reproduction

A new study shows that only two genes from the Y chromosome are needed for male reproduction.