The correct sequence of activities for the classes of genes involved in the early development of the d. melanogaster embryo is Maternal genes, then Segmentation genes, then Homeotic genes.
Due to the short lifespan of Drosophila, it is simple to develop a sizable population of individuals for genetic, biochemical, and molecular studies. Drosophila melanogaster is typically cultivated in the lab at 25 or 18°C (the latter mostly for maintaining stocks); we provide all timing for 25°C unless otherwise noted.
The maximum life span varies from 60 to 80 days depending on the culture conditions, and the generation time is around 10 days from fertilized egg to eclosed adult. The four stages of the holometabolous insect Drosophila's life cycle are embryo, larva, pupa, and adult.
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