Syndrome triples X

The syndrome triples X is a aneuploidic anomaly chromosomale characterized by the presence of a additional X chromosome in each cell of a Femme. The syndrome is also called syndrome XXX , trisomy X , triplo-X , 47xxx or aneuploïdie 47, XXX . This chromosomal anomaly starts at the time of the meiosis.

Trisomy-X appears during the division of the Gamète S of the parents. Women reached of trisomy-X are typically tall with thresholds of sensitivity slightly higher, and do not present increased risks on the medical level.

Symptoms

problems. Females with the syndrome are usually to tiller than average, may cuts menstrual irregularities, and, although rarely exhibiting severe learning difficulties (US: mentally retarded), sometimes cuts off year increased risk learning disabilities and delayed speech and language skills. Researchers are not yet some why year extra Copy off the X chromosome is associated with tall stature and learning resulting in nap girls and women. Thesis characteristics vary widely among affected individuals, however. Additionally, most females with triple X syndrome cuts normal sexual development and are whitebait to conceive Child ren. -->

Causes

concealment S (Ovum and Sperm). Year error in concealment division called Nondisjunction edge result in reproductive concealments with year abnormal number off chromosomes. For example, year Oocyte gold sperm concealment may profit year extra Copy off the X chromosome ace has result off the nondisjunction. Yew one off reproductive thesis atypical concealments contributes to the genetic makeup off has child, the child will cuts year extra X chromosome in each off his gold her concealments. In sum boxes, trisomy X occurs ace year accident during concealment division in early fetal development.

Summon females with triple X syndrome cuts year extra X chromosome in only nap off to their concealments. Thesis boxes are called 46, XX/47, XXX mosaic S. -->

Caused like all trisome following a chromosomal badly-segregation occurring at the time of the Gamétogenèse or more precisely the Ovogenesis (thus at the woman only) because only the woman has two X chromosomes in the core of its cells. In the same way, like all trisomies or more generally all the Aneuploïdie S, their occurrences increase with the age of the mother.

Incidence

External bonds

Community & Support

** HTTP: /www.groups.yahoo.com/group/ktxgroup/ -->

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