Exploring the biological contributions to human health: does sex matter?, Institute of Medicine (U.S.). Committee on Understanding the Biology of Sex and Gender Differences, Theresa M. Wizemann, Mary Lou Pardue, National Academies Press, 2001, ISBN 978-0-309-07281-6, ... Females Have Two X Chromosomes, Males Have One ... Male and female genomes also differ in the other sex chromosome, the X chromosome, in that females have twice the dose of X-chromosome linked genes that males have ...
The Human Genome: A User's Guide, Julia E. Richards, R. Scott Hawley, Academic Press, 2010, ISBN 978-0-12-333445-9, ... These data demonstrated clearly that it is not simply the presence of the Y chromosome that creates a normal male but rather a small amount of genetic material now known to be a single gene located on the Y chromosome called the SRY ...