Definitions for "Sex Chromosome"
The 23rd chromosomal pair, where the sex of the unborn child is determined. Each female carries two X chromosomes and each male carries one X and one Y chromosome. At conception, a child receives an X chromosome from mom and either an X chromosome (resulting in a female child) or a Y chromosome (resulting in a male child) from dad.
An X or a Y chromosome which are different from the 22 autosomes.
special sex-determining chromosome.