48,XYYY
48,XYYY
48,XYYY (pronounced "forty-eight, X-triple-Y") is a rare chromosomal abnormality in which a male has an extra two copies of the Y chromosome in each cell.
Etymology
The term "48,XYYY" is derived from the karyotype notation used to describe the number and type of chromosomes present in an individual's cells. In this case, "48" refers to the total number of chromosomes, and "XYYY" indicates one X chromosome and three Y chromosomes.
Pronunciation
The term "48,XYYY" is pronounced as "forty-eight, X-triple-Y".
Related Terms
- Karyotype: The number and visual appearance of the chromosomes in the cell nuclei of an organism or species.
- Chromosome: A DNA molecule with part or all of the genetic material of an organism.
- Y chromosome: One of two sex chromosomes in mammals, including humans, and many other animals. The other is the X chromosome. Y is the sex-determining chromosome in many species, since it carries the genes responsible for male development.
- X chromosome: A sex chromosome, two of which are normally present in female cells (designated XX) and only one in male cells (designated XY).
- Sex chromosome: A type of chromosome in the genome that is involved in sex determination.
- Chromosomal abnormality: Any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities.
See Also
External links
- Medical encyclopedia article on 48,XYYY
- Wikipedia's article - 48,XYYY
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