With Down syndrome, many people may not know that there are different forms of this disability based on genetic variations. The most common form of Down syndrome is Trisomy 21, which around 95% of people with Down syndrome have.
But genetics are complicated. While Trisomy 21 leads to an extra chromosome in every cell of the body, sometimes this isn’t the case.
Some people have a form of Down syndrome where only some cells have the extra chromosome — called mosaic Down syndrome. And while there isn’t necessarily a difference in the supports and therapies needed to support those with either type of Down syndrome, here’s what you need to know about mosaic Down syndrome. What is Mosaic Down syndrome? Trisomy 21 is a genetic disability that
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