What is unisomy?

Answer 1

When there is one chromosome missing. Making a pair of chromosomes have one part missing.

Answer 2

Unisomy is a genetic condition where an individual has an extra copy of a single chromosome instead of the normal pair. This can lead to various medical conditions or developmental delays depending on which chromosome is affected. Examples of unisomy conditions include Down syndrome (Trisomy 21) and Klinefelter syndrome (XXY).