Monday, October 3, 2011

Down syndrome

Aproximately one of 650 newborn children is born with Down syndrome,with cromosomic disorder which is happening with one chromosome more. That disorder is not allowing mental and fisical growth of a child. Down syndrome is possible everywhere in all races regardless to economic situation or way of living. Better study of Down syndrome is helping us to help ill people and give them chance for easier life.

Why is Down syndrome happening?
Human body is made of large number of cells. Every cell has a core where are located hereditary materials also called genes. Genes create group of genes and they are complexed in spiral which we call chromosomes. Every healthy person has 46 chromosomes or 23 pairs. Down syndrome is caused by parents gametes,when they give to embryo one chrosome more than usual. That is syndrome nobody can predict. Down syndrome is also called trisomy 21 because there are three copies of 21st chrosome. Despite years of studying,scientists still doesnt know why is that one chromosome happening. It is only known that women from 35 and older have bigger possibility to born child with Down syndrome.
It is known over 50 characteristics of syndrome. In dyagnosis mother can see right after birth,that baby is having specific look. Then doctor is taking some medical searches of blood which is called karyotype. Karyotype is showing number of chromosomes and their size and look. Here are some specific characteristics of ill children:
Muscular hipotony, reduction of tension of muscle
     Wide neck. The child may have a short, wide neck with excess skin and fatty tissue
     Inclined position of eye opening (the person's facial features mongol race, of which he was         commonly called "mongolodysm")
     A round face straight profile
     Abnormal form of ears
     Quick hands on the palm of a specific transverse furrow
     Small mouth and nose with a disproportionately large tongue
     Short and broad hands and feet, often there is a gap between the big toe and the adjacent finger
     Short rib cage of an unusual shape
     small head

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