2n-1 is

Solution (By Examveda Team)

2n-1 is Monosomic.
Monosomy refers to the condition in which only one chromosome from a pair is present in cells rather than the two copies usually found in diploid cells.
It is a term to describe the absence of one member of a chromosome pair, resulting in a clone with 45 chromosomes in the case of a single monosomy.