Sex determining chromosome. Females have two X Chromosomes.
A chromosome associated with sex determination. In most animals, the female has two, and the male has one X chromosome. The opposite occurs in birds, in which the equivalent is the Z chromosome.
a sex chromosome present in two copies in female somatic cells and one copy in male somatic cells.
The sex chromosome associated with female characteristics in mammals, occurring paired in the female and single in the male.
One of the two sex chromosomes, X and Y. X is the sex chromosome that is present in both sexes: singly in males and doubly in females.
One of two kinds of chromosomes which help determine the sex of an organism -- females have two X-chromosomes, males have one (a Y-chromosome is the other chromosome which helps determine sex).
One of the two types of sex chromosome, X and Y. In humans, females have two X-chromosomes, while males have one X and one Y.
One of the two sex chromosomes containing the genes that determine whether a given animal will be male or female. In mammalian females, both sex chromosomes are X-chromosomes; in mammalian males, there is one X-chromosome and one Y-chromosome. Glossary: Y
