zygosity noun. [zʌɪ'gɒsɪti] M20.
[from ZYGOS(IS + -ITY.]
Genetics.
1. The genetic relationship of twins, triplets, etc., in respect of their being monozygotic, dizygotic, etc. M20.

2. The degree of genetic similarity between alleles which determines whether an individual is homozygotic or heterozygotic for the characteristic expressed. M20.

[TahlilGaran] English Dictionary ▲