| zygotic | Pertaining to a zygote, or to zygosis. (05 Mar 2000) |
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| zygotic effect gene | <genetics> A gene whose phenotype is dependent on the genotype of the zygote, rather than the genotype of the mother. See: maternal effect gene. (18 Nov 1997) |
| zygotic induction | <cell biology> A lysogenic process in which a prophage is transmitted to a cell that does not have a phage repressor protein. (09 Oct 1997) |
| zygotic lethal gene | <genetics> A mutated or otherwise defective gene at embryonic or larval stages. (06 May 1997) |