Being male is the biggest risk factor. Most cases of XYY syndrome are not inherited, and the syndrome occurs randomly in pregnancies of women from all ages and ethnic backgrounds. People normally have 46 chromosomes in each cell.
Can a girl have an extra Y chromosome?
Most females with a Y chromosome have underdeveloped gonads that are prone to developing tumours and usually removed. However, when surgeons operated with the intention of removing the gonads they found normal-looking ovaries in the girl, and took only a tissue sample.Apr 9, 2009
Is an XXY human male or female?
Usually, a female baby has 2 X chromosomes (XX) and a male has 1 X and 1 Y (XY). But in Klinefelter syndrome, a boy is born with an extra copy of the X chromosome (XXY). The X chromosome is not a "female" chromosome and is present in everyone. The presence of a Y chromosome denotes male sex.
What happens if you have an XXY chromosome?
As XXY males enter puberty, they often don't make as much testosterone as other boys. This can lead to a taller, less muscular body, less facial and body hair, and broader hips than other boys. As teens, XXY males may have larger breasts, weaker bones, and a lower energy level than other boys.
CAN XXY have babies?
It is possible that an XXY male could get a woman pregnant naturally. Although sperm are found in more than 50% of men with KS3, low sperm production could make conception very difficult.Dec 1, 2016
What happens if someone is born with XYY chromosome?
The extra X and/or Y chromosome can affect physical, developmental, behavioral, and cognitive functioning. Common physical features may include tall stature, lack of secondary pubertal development, small testes (hypogonadism), delayed pubertal development, and breast development (gynecomastia) in late puberty.
How does XYY syndrome affect the body?
Physical features related to 47,XYY syndrome can include increased belly fat, a large head (macrocephaly ), unusually large teeth (macrodontia ), flat feet (pes planus ), fifth fingers that curve inward (clinodactyly ), widely spaced eyes (ocular hypertelorism ), and abnormal side-to-side curvature of the spine ( Sep 8, 2020
What is the difference between XXY and XYY?
Although 47,XXY is the most common sex chromosomal condition, mosaic patterns (46,XY/47,XXY) and additional X's and/or Y such as 48,XXYY48,XXYYSummary. Listen. 48,XXYY syndrome is a chromosomal condition, characterized by the presence of an extra X and Y chromosome in males, that causes medical and behavioral problems. 48,XXYY can be considered a variant of Klinefelter syndrome.https://rarediseases.info.nih.gov › diseases › 48xxyy-syndrome48,XXYY syndrome - Genetic and Rare Diseases Information Center ; 48,XXXY48,XXXYXXXY syndrome is a genetic condition characterized by a sex chromosome aneuploidy, where individuals have two extra X chromosomes. People in most cases have two sex chromosomes: an X and a Y or two X chromosomes.https://en.wikipedia.org › wiki › XXXY_syndromeXXXY syndrome - Wikipedia; and 47,XYY can occur although less frequently than 47,XXY.Feb 1, 2014
What event is most likely to cause XYY syndrome?
Most cases of XYY syndrome are due to a cell division error in the sperm prior to conception. Rarely, the cell division error occurs after conception resulting in a mosiac of cells with 46 chromosomes and 47 chromosomes.
What is the life expectancy of XYY syndrome?
The median age of survival was 77.9 years for controls and 67.5 years for 47,XYY persons, corresponding to a loss of median lifespan of 10.3 years.
Can people with Klinefelter syndrome produce sperm?
Most men with Klinefelter syndrome produce little or no sperm, but assisted reproductive procedures may make it possible for some men with Klinefelter syndrome to father children.
What are the chances of having a child with Klinefelter syndrome?
Number of extra X chromosomes One (XXY) Three (XXXXY)
------------------------------------------ --------- ----------------------
Number of newborn males with the condition 1 in 500 1 in 85,000 to 100,000