IPA: /nɒnˈkrɔːsəʊvə/
KK: /nɑnˈkrɔsˌoʊvər/
Describing something that does not involve or relate to crossover, especially in genetics where it refers to chromosomes that have not exchanged genetic material during reproduction.
The noncrossover chromosomes maintain their original genetic structure without any alterations from crossing over.
Noncrossover → It is formed from "non-" (meaning not) and "crossover" (from "cross" meaning to intersect and "over" meaning above or across). The word "noncrossover" refers to something that does not involve or is not characterized by crossing over or intersection.
Think of 'not' ('non-') involving any 'crossing over' — that's why noncrossover means something that does not cross over.