Sex determination in human beings

Sex determination in human beings Genes determining sex in human beings are located on two sex chromosomes, called allosomes. In mammals, sex determination is associated with chromosomal differences between the two sexes, typically XX females and XY males. pairs of human chromosomes include pairs of autosomes (44AA) and one pair of sex chromosomes (XX or XY). Females are homogametic producing only one type of gamete (egg), each containing one X chromosome while the males are heterogametic producing two types of sperms with X and Y chromosomes. An independently evolved XX: XY system of sex chromosomes also exist in Drosophila (Fig. . ) . (44AA+XX) (Female) (44AA+XX) (Female) (44AA+XY) (Male) (44AA+XY) (Male) (22A+X) (22A+X) (22A+X) (22A+Y) Male (Heterogametic) 44AA + XY Female (Homogametic) 44AA + XX Parents Gametes Sperms Ova Offsprings/ Progeny (F ) Fig. . Sex determination in human beings