What is Trisomy 20?
Trisomy 20 is the name given to a chromosome abnormality where cells contain three copies of chromosome 20 (hence tri-somy) rather than the normal two copies.
Trisomy 20 can exist in two states.
These are:
(i) Mosaic - hence Trisomy 20 Mosaicism
(T20M)
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(ii) Non-Mosaic - Trisomy 20
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