'zygosity' definitions:

Definition of 'zygosity'

From: GCIDE

zygosity \zy*gos"i*ty\ (z[-i]*g[o^]s"[i^]*t[y^]), n. (Biol.) The property of being either homogeneous or heterogeneous with respect to the allelic genes determining some hereditary trait in a diploid or polyploid organism; if homogeneous, the organism is homozygous; if heterogeneous, it is heterozygous. [PJC]