Sex Chromosomes in Human Inheritance

Sex chromosomes help determine biological sex in mammals, including humans. Humans have two sex chromosomes, X and Y. Each diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A female usually has two X chromosomes, while a male usually has one X chromosome and one Y chromosome.

Each cell’s nucleus contains chromosomes, thread-like structures that carry an organism’s genetic information.

There are two copies of each chromosome. In humans, there are twenty-three pairs of chromosomes, twenty-two of which are called autosomes. The twenty-third pair contains the sex chromosomes.

The sex chromosomes differ betw...