Translocation and mosaicism are two causes of Down syndrome.

Name: Translocation and mosaicism are two causes of Down syndrome.
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Translocation and mosaicism are two of the three causes of Down syndrome, with the third cause being trisomy 21. Translocation occurs when part of chromosome 21 breaks off and attaches to another chromosome, while mosaicism occurs when there is a mix of cells with an extra chromosome 21 and cells with the normal number of chromosomes.

Translocation and Mosaicism Are Two Causes of Down Syndrome