Down Syndrome Report.

What is complicate syndrome? Down syndrome is a chromosomal dis stage characterized by the battlefront of an extra #21 chromosome. Instead of having 46 chromosomes in each(prenominal) of his/her cells, a person with Down syndrome has 47. The extra chromosome may be derived from either the egg or the sperm. It is believed that during cell division of a sperm or egg, the two #21 chromosomes do not separate properly (nondisjunction). Thus, genius cell will get an extra #21 chromosome which later, if united with a normal originative fluid cell which has among others atomic number 53 #21 chromosome, may premise to trisomy 21. The offshoot cell at conception then has 47 chromosomes rather of normal set of 46 chromosomes. When this cell with 3 #21 chromosomes continues to multiply, and the pregnancy is carried to term, a baby with Down syndrome will be born. This form of chromosome error, trisomy 21, is found in about 95% of persons with Down syndrome. The 5 share of babies wi th Down syndrome who do not wee trisomy 21 may have Translocation, Mosaicism or partial tone trisomy. In translocation Down syndrome, there are also 3 copies of the #21 chromosome. However, one of the #21 chromosomes is attached or translocated on other chromosome, usually a #14, #21,or #22 chromosome. Three to quaternary percent of children with Down syndrome have translocation.

About one leash to one half of translocations are inherited from one of the enkindles. When this happens, the attack aircraft carrier elicit has the normal amount of genetic material, however one of the #21 chromosomes is attached to another chromosome. As a dissolvent this in! dividuals nitty-gritty chromosome count is 45 instead of 46. The carrier parent is clinically unaffected because there is no loss or nimiety of genetic material. Doctors refer to a parent standardised this as a balanced... If you want to get a to the full essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay