Edited by Chang Zhu
1. The gene name begins with a lowercase letter when the gene is named
for mutant phenotype recessive to the wild-type in a normal diploid. The name begins
with an uppercase letter when the gene is named for a mutant phenotype that is dominant.
2. Wild-type is used for the wild-type allele.
3. The character / is reserved as a homologue separator in genotypes.
4. Alleles of a gene are designated by superscripts or a hyphen, e.g.,
whiteapricot or white-apricot.
5. Gene, allele, aberration and transponson/transgene-construct names and symbols are
italicized in printed text. When used to indicate phenotype, rather than genotype,
then the name or symbol is printed in non-italic type.
A complete guide to the nomenclature of Drosophila melanogaster is
on web at