A sex chromosome that usually occurs paired in each female cell, and single (i.e., unpaired) in each male cell in those species in which the male typically has two unlike sex chromosomes (e.g., humans).
A sex-determining chromosome present in all of a female’s ova and in one-half of a male’s sperm. The fertilization of an ovum by a sperm having an will result in the conception of a female (XX chromosome).
A chromosome that determines sex.
Sex chromosome that in humans is present in both sexes singly in males, in duplicate in females. The X chromosome is carried by all female gametes (ova) and by half of male gametes (sperm); it is larger than the Y chromosome and is associated with many sex-linked disorders (e.g., hemophilia. Hunter’s syndrome).
The female sex chromosome, which, along with the male Y chromosome, determines sex in humans and most animals. Everyone has two sex chromosomes—either two X chromosomes or an X and a Y. Having two X chromosomes makes a person female; having an X and a Y chromosome makes a person male.
The sex chromosome present in both sexes. Women have two X chromosomes and men one. Genes for some important genetic disorders, including hemophilia, are carried on the X chromosomes; these genes are described as sex-linked.
Among the two variants of sex chromosomes, the X chromosome represents one of the fundamental types. Females typically possess a pair of X chromosomes, whereas males possess one X chromosome along with a Y chromosome. This chromosomal distinction contributes to the biological determination of an individual’s sex, playing a pivotal role in the development of sexual characteristics and reproductive systems.
The X chromosome is a sex chromosome that appears in pairs in every normal female body cell. In males, body cells contain one X and one Y chromosome, and each sperm carries either an X or a Y chromosome. Disorders related to abnormal genes on the X chromosome are known as X-linked disorders.