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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 ]
Germ-band extension is a morphogenic process widely studied in the development of Drosophila melanogaster in which the germ-band, which develops into the segmented trunk of the embryo, approximately doubles in length along the anterior-posterior axis while subsequently narrowing along the dorsal-ventral axis. [1]
170 μm – length of the largest sperm cell in nature, belonging to the Drosophila bifurca fruit fly [103] [104] 181 μm – maximum width of a strand of human hair [25] 100–400 μm – length of Demodex mites living in human hair follicles; 175–200 μm – typical thickness of a solar cell.
Drosophila (/ d r ə ˈ s ɒ f ɪ l ə, d r ɒ-, d r oʊ-/ [1] [2]) is a genus of fly, belonging to the family Drosophilidae, whose members are often called "small fruit flies" or pomace flies, vinegar flies, or wine flies, a reference to the characteristic of many species to linger around overripe or rotting fruit.
In early Drosophila development, the embryo passes through thirteen nuclear divisions (karyokinesis) without cytokinesis, resulting in a multinucleate cell (generally referred to as a syncytium, but strictly a coenocyte [1]). Pole cells are the cells that form at the polar ends of the Drosophila egg, which begin the adult germ cells. [2]
Radio-labeling was used to measure the amount of fluid incorporated into female egg production (and thus not removed from the body after 6–8 hours). They found that females with the largest vaginal swellings incorporated the highest amount of sperm from a single male partner than did females who had smaller vaginal swellings (and thus had the ...
Drosophila bifurca is a species of fruit fly. Males of this species are known to have the longest sperm cells of any organism on Earth—5.8 cm long when uncoiled, over twenty times the entire body length of the male. [1] The cells are mostly tail, and are delivered to the females in tangled coils.
[28] [29] Drosophila melanogaster produces sperm that can be up to 1.8 mm, [30] while its relative Drosophila bifurca produces the largest known spermatozoon, measuring over 58 mm in length. [28] In Drosophila melanogaster, the entire sperm, tail included, gets incorporated into the oocyte cytoplasm, however, for Drosophila bifurca only a small ...