Down syndrome or down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
New What Is It Like To Have Down Syndrome
Pics. Young children with down syndrome have an increased risk of leukemia. For children with mosaic down syndrome, some of their cells have 3 copies of chromosome 21, but other cells have the typical two copies of chromosome 21.
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Down syndrome is an intellectual disability that about 5,000 babies in the united states are born with each year. For children with mosaic down syndrome, some of their cells have 3 copies of chromosome 21, but other cells have the typical two copies of chromosome 21. Find out the type, causes, and kinds of effects it can have.
Digestive abnormalities, such as a blockage of the intestine, are less common.
We would have liked our own family, but decided against it. Getting to know them is both a process and a gift. Today, many people with the. Down syndrome is caused when one's genetic code has an extra copy of chromosome 21 (or part of one).since chromosomes normally come in pairs, this is often referred to as trisomy 21.
