姉妹 しまい染色 せんしょく分体 ぶんたい交換 こうかんじゃありませんでした
shimai senshokubuntaikōkanjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 姉妹染色分体交換

1. Was not sister chromatid exchange.; Was not a sister chromatid exchange.

Past/Perfective
Negative
Polite
Terminal Form