This a very complex question - generally, a Trisomy child will manifest the following: hypotonia and hyper-reflexibility of the joints; mental deficiency; microcephaly with a small nasal bridge and inner epicanthal folds; small, overfolding of the ears; short neck; short metacarpals of the hand; anomaly of the heart; loose folds in the posterior neck; fine, soft hair, small penis (eewww) and gonadal deficiency.
#21
Disorders, such as Down's Syndrome, are caused by nondisjunction.
There are no mental or behavioral abnormalities, but people who have Down's Syndrome have rounded shoulders, a thicker skull, and a spongy tongue which causes speech impediment.
Yes, Non-disjunction occurs when sex chromosomes fail to separate. This occurrence leads to variable numbers of chromosomes and the manifestation of developmental diseases such as Down syndrome, Turner syndrome, etc.
21
The lungs.
chromosome 21
No age group is affected; Down syndrome is a chromosome condition that is with you at birth.
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Chromosome 21 is tripled in Down syndrome.
It Could Do.
#21
The proportion of men to women with Down syndrome is about equal.
there are approxmately 1/4 million families in the united states affected by down syndrome.
Forty-seven. In Down syndrome, there is an extra 21st chromosome. It is also known as Trisomy 21.
There is no medical treatment that can cure Down syndrome. The best way to treat someone with Down syndrome is with kindness, patience, and love.
It is acceptable to say that someone has Down Syndrome, although it may not be necessary to say it since the syndrome does have a characteristic affect on facial features which can be observed.