X chromosome
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  X chromosome



X chromosome

    One of the two sex chromosomes, the other being the Y chromosome. Females have two X chromosomes, and males have one X chromosome and one Y chromosome.

RELATED TERMS
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Chromosomes
Filaments of genetic material in every cell nucleus that are made up of genes and that transmit genetic information from one generation of cells to the next.

Chromosome
A structural unit within a eukaryotic nucleus that carries genes. A chromosome consists of a long, continuous strand of DNA and associated proteins.

Females
Human adult females as cultural, psychological, sociological, political, and economic entities.



SIMILAR TERMS
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PREVIOUS AND NEXT TERMS
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Xeroderma Pigmentosum
An inherited disorder that causes extreme sensitivity to sunlight and early onset of skin cancers, including basal and squamous cell and melanoma. Patients are also at risk for cancers of the brain, lung, stomach, tongue, and melanoma of the eye, and leukemia.

XYY Syndrome
Genetic condition in males with extra Y chromosome (1 in 1000 male births). XYY syndrome' s symptoms are: extreme tall stature, may include sterility, developmental delay and learning problems.

Xanax
This is a prescription drug used to treat anxiety. It is a central nervous system depressant, and can therefore have a negative impact on coordination and mental alertness. Side effects typically include drowsiness and/or mood changes.

Xerostomia
Dry mouth or decrease in the production of saliva .

X inactivation
Normal inactivation of one of the two X chromosomes in females.

X chromosome

Xanith
In Arabic, the term usually translated as male homosexual, but applied only to men who partially impersonate women in clothing, manner, and life-style, and in their sexuoerotic role with other men.

X-linked recessive
In genetics, a defect that is carried on the X chromosome, and that can express itself only if both X chromosomes in an individual carry the defect (in females) or if the X chromosome carrying the defect is paired with a Y chromosome (in males). These defects are much more commonly expressed in males than in females.

XO syndrome
See Turner's syndrome.

XXY syndrome
See Klinefelter's syndrome.

Xanthelasma
Fatty deposits that appear as yellowish patches, or plaques, under the skin, often appearing in or near the eyelids.

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