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 is because almost all cases of Rett syndrome are caused by mutations found on an X chromosome gene called methyl CpG binding protein, or MECP2.
—
William A. Haseltine, Forbes, 27 Feb. 2024
Xist molecules work with those proteins to shut down gene expression in the second X chromosome.
—Katie Hunt, CNN, 9 Feb. 2024
The inactivated X chromosome makes Xist, which establishes an X-inactivation center on that chromosome.
—Diana Gitig, Ars Technica, 6 Feb. 2024
To prevent the body from making too many of these proteins, one of the two X chromosomes in females is silenced in a process called X-chromosome inactivation.
—Will Sullivan, Smithsonian Magazine, 5 Feb. 2024
The research states that a type of RNA produced by a woman’s X chromosomes creates proteins that could make the immune system attack itself if genetic predisposition or other factors are present.
—Emma Hinchliffe, Fortune, 2 Feb. 2024
Chang’s team decided to engineer male lab mice to artificially make Xist — without silencing their only X chromosome — and see what happened.
—TIME, 2 Feb. 2024
In mice, Stanford scientists found that an RNA molecule called Xist helps prevent female cells from activating both sets of their X chromosome genes, which would be deadly.
—Meghana Keshavan, STAT, 2 Feb. 2024
The genetic analysis showed that some cells had one X chromosome and others had the usual two, known as mosaic Turner syndrome.
—Elizabeth Rayne, Ars Technica, 15 Jan. 2024
William A. Haseltine, Forbes, 27 Feb. 2024
Xist molecules work with those proteins to shut down gene expression in the second X chromosome.
—Katie Hunt, CNN, 9 Feb. 2024
The inactivated X chromosome makes Xist, which establishes an X-inactivation center on that chromosome.
—Diana Gitig, Ars Technica, 6 Feb. 2024
To prevent the body from making too many of these proteins, one of the two X chromosomes in females is silenced in a process called X-chromosome inactivation.
—Will Sullivan, Smithsonian Magazine, 5 Feb. 2024
The research states that a type of RNA produced by a woman’s X chromosomes creates proteins that could make the immune system attack itself if genetic predisposition or other factors are present.
—Emma Hinchliffe, Fortune, 2 Feb. 2024
Chang’s team decided to engineer male lab mice to artificially make Xist — without silencing their only X chromosome — and see what happened.
—TIME, 2 Feb. 2024
In mice, Stanford scientists found that an RNA molecule called Xist helps prevent female cells from activating both sets of their X chromosome genes, which would be deadly.
—Meghana Keshavan, STAT, 2 Feb. 2024
The genetic analysis showed that some cells had one X chromosome and others had the usual two, known as mosaic Turner syndrome.
—Elizabeth Rayne, Ars Technica, 15 Jan. 2024
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'X chromosome.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near X chromosome
Cite this Entry
“X chromosome.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/X%20chromosome. Accessed 19 Apr. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share