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Klinefelter syndrome is not an inherited condition. The extra X chromosome comes from the mother in approximately 50% of the cases. Maternal age is the only known risk factor. Women at 40 years have a four-times-higher risk of a child with Klinefelter syndrome than women aged 24 years. [14] [34] [35]
XYY syndrome, also known as Jacobs syndrome, is an aneuploid genetic condition in which a male has an extra Y chromosome. [1] There are usually few symptoms. [2] These may include being taller than average and an increased risk of learning disabilities. [1] [2] The person is generally otherwise normal, including typical rates of fertility. [1]
48,XXYY syndrome is a condition related to the X and Y chromosomes (the sex chromosomes). People normally have 46 chromosomes in each cell.Two of the 46 chromosomes, known as X and Y, are called sex chromosomes because they help determine whether a person will develop male or female sex characteristics.
XXXY syndrome is a genetic condition characterized by a sex chromosome aneuploidy, where individuals have two extra X chromosomes. [2] ... Like Klinefelter syndrome ...
Researchers in the United Kingdom have discovered a way to identify genetic conditions in people who lived thousands of years ago. ... Jacob’s syndrome and Klinefelter syndrome. ...
Klinefelter’s syndrome occurs when a man is born with one or more extra X chromosomes, leading to a variety of impacts that include underdeveloped testicles, impaired testosterone production ...
Hypergonadotropic hypogonadism can be caused by a variety of genetic and acquired factors. Common genetic causes include Turner syndrome and Klinefelter syndrome, while acquired causes may involve infections, trauma, radiation, or chemotherapy affecting the gonads. [13]
Congenital muscular dystrophy-infantile cataract-hypogonadism syndrome is a very rare genetic disorder which is characterized by congenital muscular dystrophy, infantile-onset cataract, and hypogonadism. Males usually develop Klinefelter syndrome while females develop agenesis of the ovaries. [2]