Causes of Klinefelter Syndrome
The additional sex chromosomes in men with Klinefelter syndrome results from nondisjunction during meiosis and may have a paternal (50 to 60 percent) or maternal (40 to 50 percent) origin. This contrasts with Down syndrome, which is caused predominantly by maternal nondisjunction and inheritance of the extra chromosome 21 from the mother.
Klinefelters is sex chromosome trisomy. Down Syndrome is trisomy. One of the most common forms of MD is sex-linked and affects boys more frequently than it does girls.
One is able to find more information on down alternatives on websites such as Wikipedia, the Down Syndrome website, and the Kids Health Website online.
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.
The Down Syndrome Organisation of the UK has a wonderful website. To help you find out more about the syndrome, see the Related Link.
Some symptoms include intellectual disability, hypothyroidism, and heart defects. Some characteristics of people with Down Syndrome are short stature, weak muscles, slanted eyes, a pushed-in nose bridge, and irregular mouths/tongues.
No. Someone with Down's syndrome could also happen to have epilepsy, but if they do it isn't always to do with the fact that they have Down's Syndrome. Some people with Down's Syndrome will have or develop Epilepsy, but there is no guarantee that because someone has Down's Syndrome that they will also have Epilepsy.
chromosome 21
3 Pairs of Chromosome 21There are 47 chromosomes in someone with Down syndrome (most people have 46); the 21st pair has an extra chromosome. Down syndrome is also known as "Trisomy 21" - a reference to the fact that someone with Down syndrome has 3 pairs of chromosomes 21.
No.
No! If someone has Down syndrome, he or she was born with it. It happens when the fetus develops an extra chromosome.
Why not try the National Down Syndrome Society's site? I'll leave a Related Link.