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).
Molly Cerreta Smith. We all learned in science class that men determine the sex of a baby based on whether their sperm is carrying an X or a Y chromosome. Combined with the mother's X chromosome, an X chromosome will produce a baby girl (XX) and a Y chromosome will make a baby boy (XY).