Answer: They define the segmented body plan of the embryo.
A pair-rule gene is a type of gene involved in the development of the segmented embryos of insects.Pair-rule genes are expressed as a result of differing concentrations of gap gene proteins which encode transcription factors controlling pair-rule gene expression. Pair-rule genes are defined by the effect of a mutation in that gene which causes the loss of the normal developmental pattern in …
Gap gene – Wikipedia
Gap gene – Wikipedia
Homeobox – Wikipedia
Pair-rule gene – Wikipedia
A gap gene is a type of gene involved in the development of the segmented embryos of some arthropods. Gap genes are defined by the effect of a mutation in that gene which causes the loss of contiguous body segments resembling a gap in the normal body plan. Each gap gene therefore is necessary for the development of a section of the organism.
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. The small size short generation time and large brood size make it ideal for genetic …
Types. There are several subsets of homeotic genes . They include many of the Hox and ParaHox genes that are important for segmentation . Hox genes are found in bilateral animals including Drosophila (in which they were first discovered) and humans. Hox genes are a subset of the homeobox genes . The Hox genes are often conserved across species so some of the Hox genes of Drosophila are …
Gap genes in the fruit fly are switched on by genes such as bicoid setting up stripes across the embryo which start to pattern the body’s segments. The Bicoid Hunchback an…