What is trisomy? By what mechanisms does it come into existence

Trisomy is a genetic condition that occurs when an individual has three copies of a particular chromosome instead of the typical two copies. This extra chromosome disrupts the normal genetic balance and can lead to various developmental abnormalities and health issues.

Trisomy can arise through different mechanisms. The most common form of trisomy is called non-disjunction, which occurs during cell division in either the egg or the sperm. Normally, each _________ __________ ____ _________ _______ _______ ____ _____ __________ _________.
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