2007-09-09 23:57:12 · 3 answers · asked by melaniejoy_tulagan2001 1 in Health ➔ Diseases & Conditions ➔ Other - Diseases
there are no definite factors that contribute to ds. some studies have shown that women over 35 are at a higher risk, but it can happen to any woman. ds occurs in 1 out of 800 live births. trisomy 21 is the most common form of ds; it is caused by an extra 21st chromosome and it is seen in all cells of the body. mosaic's ds is a bit different...it too is caused by an extra chromosome however, it is only seen in some cells in the body. edward's syndrome is another one, though not as common and children born with this tend not to live for very long due to complications.
2007-09-10 01:17:26 · answer #1 · answered by julie's_GSD_kirby 5 · 0⤊ 0⤋
Trisomy 21 is the most common cause. Trisomy meaning 3 and 21 referring to which chromosome is affected. You and I have two of each chromosome. Most people with DS have an this extra one. This particular set of chromosomes causes those common characteristics these babies carry. Which is why they all look like angels. This gene is usually from the mom's side but, this never means she did anything wrong. Amber's mom
2007-09-11 14:28:23 · answer #2 · answered by Honey Bunny 2 · 0⤊ 0⤋
It is most common for older mother's to produce Down Syndrom children
There is a gene missing. #13 or something like that. it is the middle of the night I can say for sure which gene is responsible
2007-09-10 00:05:51 · answer #3 · answered by clcalifornia 7 · 0⤊ 1⤋