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X chromosome

noun

Genetics.

a sex chromosome of humans and most mammals that determines femaleness when paired with another X chromosome and that occurs singly in males.

X-chromosome

noun

the sex chromosome that occurs in pairs in the diploid cells of the females of many animals, including humans, and as one of a pair with the Y-chromosome in those of males Compare Y-chromosome

X-chromosome

The sex chromosome that in female mammals is paired with another X-chromosome and in males is paired with a Y-chromosome. Very few genes on the X-chromosome have counterparts on the Y-chromosome, and since males have only one X-chromosome, any gene present on it (even if the gene is recessive in females) is expressed in males. In females, one of the two X-chromosomes in each cell is deactivated.
See more at sex chromosome See note at sex

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Word History and Origins

Origin of X-chromosome¹

First recorded in 1910–15

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Example Sentences

Examples have not been reviewed.

This tallies with the fact that the gene is carried on the X chromosome.

From

The abnormal IP gene is located on the X chromosome.

From

Using skin samples collected from variously colored cats, the researchers homed in on a mutation on the X chromosome that increases the amount of a protein called Arhgap36 only in pigment-producing cells called melanocytes.

From

Multicolored cats from such a cross are almost always female, suggesting the gene variant that makes fur orange or black is located on the X chromosome.

From

It may have some genetic material missing, damaged or swapped with the X chromosome, depending on the variation.

From

X-C xcl

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