| Z gene | The structural gene for beta-galactosidase. (05 Mar 2000) |
|---|---|
| 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 lethal gene | <genetics> A mutated or otherwise defective gene at embryonic or larval stages. (06 May 1997) |
| late gene | <genetics, molecular biology> Gene expressed relatively late after infection of a host cell by a virus, usually structural proteins for the viral coat. (18 Nov 1997) |
| functional gene test | Test for a specific protein iwhich indicates that the corresponding gene is not only present but active. (12 Dec 1998) |
| lethal gene | A gene that produces a genotype that leads to death of the organism before reproduction is possible or that precludes reproduction; for a recessive gene the homozygous or hemizygous state is lethal. (05 Mar 2000) |
| fushi tarazu gene | <molecular biology> A gene found in the fruit fly Drosophila melanogaster. Normal fruit fly embryos look like a series of stacked discs, which are called segments. Each segment eventually develops into specific adult fly structures (wings, antennae, legs, eyes, etc.) Flies which have a mutant form of the ftz gene are missing every other segment. (05 Jan 1998) |
| fusion gene | <molecular biology> A hybrid gene created by joining portions of two different genes (to produce a new protein) or by joining a gene to a different promoter (to alter or regulate gene transcription). (05 Jan 1998) |
| linked gene | <genetics> Genes and / or markers that are so closely associated on the chromosome that they are inherited together in 80% or more of cases. (14 Oct 1997) |