Essay on Down's Syndrome

quite a little?s Syndrome or Trisomy 21 is a genetic ascertain affecting an individual?s mental and physical abilities. It is the near common chromosomal drill associated with retardation and is caused by an delusion during cubicle development. shoot?s Syndrome occurs amongst all ethnic groups. The retainer can ordinaryly be diagnosed during pregnancy or at birth. Down?s Syndrome was frontmost recognised in 1866 by English doctor, John Langdon Down. He described the discipline and it was after given his name. The cause of the condition was unknown until 1959 when Professor Jerome Lejeune be that Down?s Syndrome was a chromosomal irregularity. Lejeune noted the figurehead of an wasted chromosome 21 and it was later on discovered that additional chromosomal material was the associated with developmental abnormalities. stack with Down?s Syndrome become 47 chromosomes sort of of the usual 46 chromosomes. The cause is the social movement of an bare(a) jolly up of c hromosome 21. This can occur as a whole extra chromosome or as extra part of the chromosome (translocation). The seriousness of the condition depends largely on the extent of the extra copy. That is, an individual who whole has a small amount of additional chromosome material testament not be affected as severely as an individual with a full copy of chromosome 21. The image under shows the extra copy of chromosome 21.

Chromosome 21 is duplicated because of a random accompaniment or ?mistake? in kiosk development. This chromosome comes from either the mother, preceptor or during pregnancy. During cell division, a call down may produce an abnormal cell ! with 24 chromosomes quite of 23. If this cell is fertilised, the go bad will have 47 chromosomes sort of of 46. Since cells continue to copy genetic information, the extra chromosome is duplicated throughout the shaver?s cells. The child born will have Down?s Syndrome. The extra chromosome can also... If you want to get a full essay, order it on our website: OrderCustomPaper.com

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