This page details the segmentation of Drosophila melanogaster, which features 14 body segments (3 head, 3 thoracic, 8 abdominal). The segmentation is controlled by maternal mRNA gradients, particularl...This page details the segmentation of Drosophila melanogaster, which features 14 body segments (3 head, 3 thoracic, 8 abdominal). The segmentation is controlled by maternal mRNA gradients, particularly bicoid and nanos, influencing genes like hunchback and even-skipped. These gradients function as transcription factors, facilitating gene activation patterns crucial for segment formation.