What is translocation Down syndrome?
Translocation Down syndrome refers to the type of Down syndrome that is caused by rearranged chromosome material. In this case, there are three 21 chromosomes, just like there are in trisomy 21, but one of the 21 chromosomes is attached to another chromosome, instead of being separate.
3% to 4% of babies born with Down syndrome have translocation Down syndrome. In translocation Down syndrome, the extra 21 chromosome may be attached to the 14 chromosome, or to other chromosome numbers like 13, 15, or 22. In some cases, two 21 chromosomes can be attached to each other.
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Keyword: translocation down syndrome