Triple X syndrome , also known as trisomy X and 47,XXX , is characterized by the presence of an extra X chromosome in each cell of a female. Triple X is due to a random event. Treatment may include speech therapy, physical therapy, and counseling. Because the vast majority of triple X females are never diagnosed, it may be very difficult to make generalizations about the effects of this syndrome. The samples that were studied were small and may be nonrepresentative. Because of the lyonization , inactivation, and formation of Barr bodies in all female cells, only one X chromosome is active at any time. A person with triple X syndrome will have two Barr bodies in each cell, leading to most persons having only mild effects or no effects.
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This condition occurs in about 1 in 1, newborn girls. Five to 10 girls with triple X syndrome are born in the United States each day. 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. Triple X syndrome results from an extra copy of the X chromosome in each of a female's cells. As a result of the extra X chromosomeeach cell has a total of 47 chromosomes 47,XXX instead of the usual An extra copy of the X chromosome is associated with tall stature, learning problems, and other features in some girls and women.
Some females with triple X syndrome have an extra X chromosome in only some of their cells. Most cases of triple X syndrome are not inherited.
Girls with triple X syndrome can develop speech, learning, or social challenges at a young age. This can make them more likely to have low self-esteem and lead to school or social problems. If your daughter has trouble making friends or struggles at school, talk to your doctor or the principal or school counselor. Watch Triple X Naked Chinese Girls porn videos for free, here on u-j-s.com Discover the growing collection of high quality Most Relevant XXX movies and clips. No other sex tube is more popular and features more Triple X Naked Chinese Girls scenes than Pornhub! Browse through our impressive selection of porn videos in HD quality on any device you own.
The chromosomal change 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.
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For example, an egg or sperm cell may gain an extra copy of the X chromosome as a result of nondisjunction. If one of these atypical reproductive cells contributes to the genetic makeup of a child, the child will have an extra X chromosome in each of the body's cells.
It occurs as a random event during cell division in early embryonic development. Am J Med Genet A.
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