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Drosophila embryogenesis, the process by which Drosophila (fruit fly) embryos form, is a favorite model system for genetics and developmental biology. The study of its embryogenesis unlocked the century-long puzzle of how development was controlled, creating the field of evolutionary developmental biology. [1]
Aug 3, 2023 · Embryogenesis. 1. Fertilization of Drosophila can only occur in the region of the oocyte that will become anterior of the embryo. Moreover, the sperm tail appears to stay in this region. 2. Cleavage. Most insect eggs undergo superficial cleavage, wherein a large mass of centrally located yolk confines cleavage to the cytoplasmic rim of the egg.
Superficial cleavage in a Drosophila embryo. The early divisions occur centrally. The numbers refer to the cell cycle. At the tenth cell cycle (512-nucleus stage 2 hours after fertilization), the pole cells form in the posterior, and the nuclei and their (more...)
This single-cell atlas of Drosophila embryogenesis reveals cell lineages and their developmental relationships and links enhancer usage and gene expression.
During Drosophila early embryogenesis, the embryo undergoes 13 rounds of rapid, synchronized nuclear division cycles in a common cytoplasm, leading to the formation of a syncytial blastoderm that contains 6000 nuclei prior to cellular blastoderm formation.
Developmental tables based on changes in the external morphology of the embryo are available for several species of animals. Similarly, conventions have been established to subdivide embryogenesis of Drosophila into a series of stages.
In this chapter we present a summary of Drosophila embryogenesis referring to this more general, widely used classification of stages; in the next chapter we shall present another, more detailed staging system supported by the characteristics of the embryogenetic process in Drosophila melanogaster.
