ploidy; polyploidy
Genetics term referring to the number of complete sets of chromosomes in a cell. Often used in contexts like 倍数性の変化 (change in ploidy) or 倍数性解析 (ploidy analysis).
Ploidy plays an important role in the evolution of organisms.
この植物は倍数性が異なる複数の品種がある。
This plant has several varieties with different ploidy levels.