How is Klinefelter syndrome passed on?
Klinefelter syndrome is not inherited , but usually occurs as a random event during the formation of reproductive cells (eggs and sperm). An error in cell division called nondisjunction can result in reproductive cells with an abnormal number of chromosomes .
Who causes Klinefelter syndrome?
Klinefelter syndrome is caused by an additional X chromosome. This chromosome carries extra copies of genes, which interfere with the development of the testicles and mean they produce less testosterone (male sex hormone) than usual.
Does a man with Supermale syndrome inherit it from his mother or father?
The condition is generally not inherited from a person’s parents but rather occurs as a result of a random event during sperm development. Diagnosis is by a chromosomal analysis, but most of those affected are not diagnosed within their lifetime.
Does Klinefelter syndrome come from Mom or Dad?
Although Klinefelter syndrome is a genetic condition, it is not hereditary or inherited from the parents. Instead, it is believed to occur due to a random error during the cell division of the sperm or egg cell that is responsible for giving rise to the the fetus.
Who is most likely to get Klinefelter syndrome?
Klinefelter syndrome occurs in about 1 out of 500 to 1,000 baby boys. Women who get pregnant after age 35 are slightly more likely to have a boy with this syndrome than younger women.
What causes XXY?
Mosaic Klinefelter syndrome (46,XY/47,XXY) is also not inherited. It occurs as a random error during cell division early in fetal development. As a result, some of the body’s cells have the usual one X chromosome and one Y chromosome (46,XY), and other cells have an extra copy of the X chromosome (47,XXY).
Why is it called Superman Syndrome?
The term ‘superman’ refers to the presence of the additional male-defining Y chromosome and affects approximately 1 in every 850 males.
How common is Klinefelters?
Klinefelter syndrome affects about 1 in 650 newborn boys. It is among the most common sex chromosome disorders, which are conditions caused by changes in the number of sex chromosomes (the X chromosome and the Y chromosome).