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%ما هو (من)٪ 1 - تعريف
SEX CHROMOSOME PRESENT IN BOTH SEXES, OF SPECIES IN WHICH THE MALE IS THE HETEROGAMETIC SEX
Chromosome X (human); Chromosomes, human, x; X chromosomes; X-chromosome; X Chromosome; Chromosome X; Human chromosome X; Human X chromosome; X chromosome (human); Unguarded X hypothesis
X chromosome
(X chromosomes)
An X chromosome is one of an identical pair of chromosomes found in a woman's cells, or one of a non-identical pair found in a man's cells. X chromosomes are associated with female characteristics. Compare Y chromosome
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N-COUNT
X chromosome
¦ noun Genetics (in humans and other mammals) a sex chromosome, two of which are normally present in female cells (designated XX) and only one in male cells (designated XY). Compare with Y chromosome.
X-chromosome reactivation
Draft:X chromosome reactivation
X chromosome reactivation (XCR) is the process by which the inactive X chromosome (the Xi) is re-activated in the cells of eutherian female mammals. Therian female mammalian cells have two X chromosomes, while males have only one, requiring X-chromosome inactivation (XCI) for sex-chromosome dosage compensation.
ويكيبيديا
X chromosome
The X chromosome is one of the two sex chromosomes in many organisms, including mammals, and is found in both males and females. It is a part of the XY sex-determination system and XO sex-determination system. The X chromosome was named for its unique properties by early researchers, which resulted in the naming of its counterpart Y chromosome, for the next letter in the alphabet, following its subsequent discovery.
أمثلة من مجموعة نصية لـ٪ 1
1. One of those areas is the X–chromosome, which is intriguing.
2. Males have only one X chromosome, which is necessary for reproduction.
3. If it had not, modern man‘s X chromosome would look as old (or nearly as old) as the other chromosomes.
4. "The genes that are a barrier to speciation tend to be on the X–chromosome," said David Reich, the main author of the study.
5. The researchers said their findings supported that idea Y chromosome sperms are able to swim faster than X chromosome sperms in thick, viscous fluids.