AP BIOLOGY

Detailed explanation-1: -The female has two X chromosomes, and all female egg cells normally carry a single X. The eggs fertilized by X-bearing sperm become females (XX), whereas those fertilized by Y-bearing sperm become males (XY).

Detailed explanation-2: -Each person normally has one pair of sex chromosomes in each cell. The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes. Identifying genes on each chromosome is an active area of genetic research.

Detailed explanation-3: -One X-chromosome enters each gamete during meiosis at the time of gamete formation. So all gametes have an X-chromosome. The females are thus homogametic. It means that all gametes produced have only one type of sex chromosome, the X chromosome.

Detailed explanation-4: -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).