# nullizygous

> English word · Adjective

## Definitions
1. Carrying two mutant alleles for the same gene, both alleles being complete loss-of-function or "null" alleles.

## Etymology
From nulli- + -zygous.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/nullizygous