Animals DNA Mutational Analysis Development Drosophila melanogaster Gene Expression Profiling Gene Expression Regulation, Developmental Genes, Insect Genetic architecture Hexapoda Homozygote Larva Mutagenesis OR gene Olfactory Receptor Neurons Olfactory behavior Smell Time Factors animal article controlled study dynamics female gene gene expression gene expression profiling gene expression regulation gene function gene insertion gene rearrangement genetic analysis