sex chromosomes

The two chromosomes in each body cell of a living thing that determine what sex it is.

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Notes

As with other pairs of chromosomes, one of the sex chromosomes is contributed by each parent; they are of two types, X and Y. The mother supplies only an X-chromosome, but the father can transmit both the X- and the Y-chromosome. At fertilization , if the father's sperm is also carrying an X-chromosome, the child will be female. If the father's sperm is carrying a Y-chromosome, the child will be male.

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Example Sentences

Examples have not been reviewed.

There are believed to be two ways in which sex chromosomes can cause sex-specific differences, also called sexual dimorphism, in cells.

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These findings shed light on the evolution of sex chromosomes and inform understanding of diseases related to genes on these chromosomes in both apes and humans.

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The genome consists of 2.9 billion base pairs, which form 23 autosomal chromosomes, and X and Y sex chromosomes.

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Female birds have two different sex chromosomes, designated W and Z, while males have two Z chromosomes.

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They screen for chromosomal disorders such as trisomy 13 and 18, which often end in miscarriage or stillbirth, Down syndrome and extra or missing copies of sex chromosomes.

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sex chromosome sex crime

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