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When not to copy: female fruit flies use sophisticated public information to avoid mated males
Sperm - Wikipedia
Sperm is the male reproductive cell , or gamete , in anisogamous forms of sexual reproduction forms in which there is a larger, "female" reproductive cell and a smaller, "male" one. Animals produce motile sperm with a tail known as a flagellum , which are known as spermatozoa , while some red algae and fungi produce non-motile sperm cells, known as spermatia. Sperm cells form during the process known as spermatogenesis , which in amniotes reptiles and mammals takes place in the seminiferous tubules of the testes. The spermatocytes then undergo meiosis , reducing their chromosome number by half, which produces spermatids. The spermatids then mature and, in animals, construct a tail, or flagellum, which gives rise to the mature, motile sperm cell.
Mechanisms underlying the sperm quality advantage in Drosophila melanogaster
Metrics details. The invasive fruit pest Drosophila suzukii was reported for the first time in Europe and the USA in and has spread since then. Stage or tissue-specifically expressed genes are of particular importance in the field of insect biotechnology. To improve genome editing, we isolated and tested the D.
Imaging sperm as they travel through the female reproductive tract has revealed new details about fertilization at the molecular level. During these processes, sperm change their swimming pattern, their cytosol becomes more basic, and the lipids that make up their plasma membrane change substantially Florman and Fissore, The final stage of capacitation is the acrosome reaction, which involves the release of enzymes from a compartment in the head of the sperm called the acrosome. It is also known that sperm from mice that do not produce a sperm-specific ion channel called CatSper do not undergo capacitation, so they are infertile Lishko and Mannowetz, ; Ren et al. The channels line up in a stripe pattern that begins in the midpiece of the sperm and extends down sperm tail Figure 1 ; Chung et al.