Prevalence of methicillin-resistant Staphylococci species isolated ... by Boa, Tyler T.; Rahube, Teddie O.; Fremaux, Bastien; Levett, Paul N.; Yost, Christopher K. / Journal of Environmental Health.
The X and Y chromosomes, also known as the sex chromosomes, determine the biological sex of an individual: females inherit an X chromosome from the father for a XX genotype, while males inherit a Y chromosome from the father for a XY genotype (mothers only pass on X chromosomes).
21.1 Genetic factors and hormones that determine gender. Genetic factors: introduction. In the nucleus of every cell of his or her body, a human being has 46 chromosomes. 22 chromosome pairs (numbered from 1-22) belong to the autosomes and 1 pair to the sex chromosomes or gonosomes. They are denoted as X and Y. A female has two X-chromosomes and a male an X and a Y-chromosome. In a woman, one of the two X-chromosomes is inactivated in the form of heterochromatin (sex chromatin), the Barr body - diagnosis of the genetic gender is made on this basis.