Homeotic genes and the homeobox.
D000818:Animals; D004331:Drosophila melanogaster / Q000196:embryology / Q000235:genetics*; D004625:Embryo, Nonmammalian / Q000648:ultrastructure; D005786:Gene Expression Regulation; D005801:Genes, Homeobox; D010641:Phenotype; D010802:Phylogeny; D012689:Sequence Homology, Nucleic Acid