In females, the XX chromosome is the primary sex chromosome, while in males, the XY chromosome is the primary sex chromosome
. Females typically have two X chromosomes, while males typically have one X and one Y chromosome
. The X chromosome is larger than the Y chromosome and contains about 900 genes, while the Y chromosome has about 55 genes
. The X and Y chromosomes determine the biological sex of an individual. Females inherit an X chromosome from their father, while males inherit a Y chromosome from their father
. The presence or absence of the Y chromosome is critical, as it contains the genes necessary for the development of male sex characteristics
. The Y chromosome has undergone rapid evolutionary deterioration, losing many genes over time
. In summary, the female chromosome is the XX, while the male chromosome is the XY. The X chromosome plays a crucial role in determining the female sex, while the Y chromosome plays a similar role in determining the male sex.
