In the US, there are currently almost 500,000 people with Down Syndrome.
Down syndrome
A down syndrome brainwave is not as strong, because people with down syndrome are missing there 21st chromosome.
Trisomic condition in which there is one extra chromosome on an autosome. For eg. Down's Syndrome
Trisomy means having three copies of a chromosomes. Turner's syndrome is NOT an example of trisomy. Someone with Turner's syndrome has only one X chromosome. Down's syndrome IS an example of trisomy. Someone with Down's syndrome has 3 copies of chromosome 21. Klinefelter's syndrome is a tricky one. On one hand, it would be considered trisomy because they have 3 sex chromosomes. However, they are not all the SAME sex chromosomes. Someone with Klinefelter's has 2 X chromosomes and one Y chromosome.
There are three different types of Down syndrome: Standard Trisomy 21, Translocation, and Mosaicism. Standard Trisomy 21 is when the extra chromosome 21 comes from either the egg or sperm cell. Between 90% and 95% of all Down syndrome is Standard Trisomy 21.
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1 out of every 691 live births
0-9 purcent
For the United States, estimated as the fraction of people in the population with the syndrome, ~1/5500.
Down Syndrome-the rest is on wikipedia
hey :) the population is down ... all the down to 99 percent
There are approximately7,222,222 people with down syndrome in the world ( if you compare the stat 1 in every 800-1000 births to the world's population of 6.5 billion).
down syndrome
Disorders, such as Down's Syndrome, are caused by nondisjunction.
Down syndrome
Down syndrome is generally the preferred spelling, although Down's syndrome is sometimes used in American sources.
Most cases of down syndrome are not inherited. Translocation Down syndrome can be inherited.