title: Molecular biology of development. Introductory comments.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D004625:Embryo, Nonmammalian / Q000502:physiology*; D005260:Female; D005306:Fertilization; D005775:Gastrula / Q000502:physiology; D005796:Genes; D008297:Male; D009154:Mutation; D009865:Oocytes / Q000166:cytology / Q000502:physiology*