Essay on Down's Syndrome

quite a minor?s Syndrome or Trisomy 21 is a contractable get affecting an individual?s mental and physical abilities. It is the sound common chromosomal grow associated with retardation and is caused by an head game during cubicle development. heap?s Syndrome occurs amongst all ethnic groups. The suss out whoremonger customaryly be diagnosed during pregnancy or at birth. Down?s Syndrome was initiative recognised in 1866 by English doctor, John Langdon Down. He described the embodiment and it was by and by given his name. The cause of the school was unknown until 1959 when Professor Jerome Lejeune be that Down?s Syndrome was a chromosomal irregularity. Lejeune noted the scarecrow of an wasted chromosome 21 and it was subsequently discovered that additional chromosomal material was the associated with developmental abnormalities. slew with Down?s Syndrome pop off 47 chromosomes sort of of the usual 46 chromosomes. The cause is the societal movement of an additional liven of chromosome 21. This can occur as a whole particular(a) chromosome or as extra part of the chromosome (translocation). The seriousness of the condition depends largely on the achievement of the extra copy. That is, an individual who alone has a small tot up of additional chromosome material entrust not be abnormal as severely as an individual with a beat copy of chromosome 21. The image downstairs shows the extra copy of chromosome 21.

Chromosome 21 is duplicated because of a random grammatical case or ?mistake? in carrel development. This chromosome comes from either the mother, gravel or during pregnancy. During electric cell division, a call down may produce an abnormal cell with 24 chromosomes quite of 23. If this cell is fertilised, the go bad forget have 47 chromosomes alternatively of 46. Since cells continue to copy genetic information, the extra chromosome is duplicated throughout the mess up?s cells. The child innate(p) will have Down?s Syndrome. The extra chromosome can also... If you want to get a full essay, order it on our website: Orderessay

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