X chromosome
noun
: a sex chromosome that usually occurs paired in each female cell and single in each male cell in species in which the male typically has two unlike sex chromosomes compare y chromosome
Examples of X chromosome in a Sentence
Recent Examples on the Web
This signaled that the mutation was somewhere on the X chromosome, since females have two of those, and presumably one lacked the killer mutation.
—
Beth Mole, ArsTechnica, 6 Oct. 2025
Some research suggests that females might be protected from certain harmful genetic mutations because of the two X chromosomes.
—Laura Baisas, Popular Science, 1 Oct. 2025
Women are twice as likely as men to develop these disorders because of the second X chromosome, which contains most genes involved in regulating the immune system.
—Elizabeth Yuko, Flow Space, 30 Sep. 2025
The test, which identifies inactivated X chromosomes to determine an athlete’s chromosomal makeup, was done by a cheek swab.
—Amy Woodyatt, CNN Money, 18 Sep. 2025
See All Example Sentences for X chromosome
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Beth Mole, ArsTechnica, 6 Oct. 2025
Some research suggests that females might be protected from certain harmful genetic mutations because of the two X chromosomes.
—Laura Baisas, Popular Science, 1 Oct. 2025
Women are twice as likely as men to develop these disorders because of the second X chromosome, which contains most genes involved in regulating the immune system.
—Elizabeth Yuko, Flow Space, 30 Sep. 2025
The test, which identifies inactivated X chromosomes to determine an athlete’s chromosomal makeup, was done by a cheek swab.
—Amy Woodyatt, CNN Money, 18 Sep. 2025
See All Example Sentences for X chromosome
Cite this Entry
“X chromosome.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/X%20chromosome. Accessed 7 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share