What is paedogenesis Wikipedia?
Paedogenesis is the act of reproduction by an organism that has not achieved physical maturity. It is associated with progenesis, where sexual maturity is achieved in the juvenile form and further physical maturity is not achieved.
What is paedogenesis example?
Paedogenesis is also known among a number of marine cladoceran crustaceans (for example, the genus Podon). The development of embryos of rediae in the sporocysts and rediae of the first generation in digenetic flukes is another example of paedogenesis.
What causes neoteny?
Doug Jones, a visiting scholar in anthropology at Cornell University, said that human evolution’s trend toward neoteny may have been caused by sexual selection in human evolution for neotenous facial traits in women by men with the resulting neoteny in male faces being a “by-product” of sexual selection for neotenous …
What insect exhibits paedogenesis?
The ability for paedogenesis is found in insects in which the larval stage reproduces without achieving maturity. It occurs in the females of certain beetles, Strepsiptera, bagworms, and gall midges. Occasionally, in certain species such as midges, the larvae are essentially born pregnant and reproduce quickly.
What is axolotl larva?
Axolotl is the larva of Amblystoma tigrinum (tiger salamander). Axolotls are those amphibians which reach adulthood without undergoing metamorphosis.
What neoteny means?
1 : retention of some larval or immature characters in adulthood. 2 : attainment of sexual maturity during the larval stage.
Are Axolotls amphibians or reptiles?
The axolotl (Ambystoma mexicanum) is neither a fish nor a lizard. This amphibian is a large, aquatic salamander native to the waterways of Mexico City. The two bodies of water where the axolotl originated, lakes Xochimilco and Chalco, gradually diminished in size as the city grew.
Which is an alternative name for paedogenesis?
Alternative Title: pedogenesis. Paedogenesis, also spelled Pedogenesis, reproduction by sexually mature larvae, usually without fertilization. The young may be eggs, such as are produced by Miastor, a genus of gall midge flies, or other larval forms, as in the case of some flukes.
How does paedogenesis occur in a salamander?
Paedogenesis is a form of neoteny and is particularly marked in the axolotl, a larval form of the salamander, which retains its larval features owing to a thyroid deficiency but can breed, producing individuals like itself. If the thyroid hormone thyroxine is given, metamorphosis occurs.
What kind of eggs are produced by paedogenesis?
You can learn more about this topic in the related articles below. Paedogenesis, also spelled Pedogenesis, reproduction by sexually mature larvae, usually without fertilization. The young may be eggs, such as are produced by Miastor, a genus of gall midge flies, or other larval forms, as in the case of some flukes.
What is the relationship between neoteny and progenesis?
Both neoteny and progenesis result in paedomorphism (or paedomorphosis ), a type of heterochrony. It is the retention in adults of traits previously seen only in the young. Such retention is important in evolutionary biology, domestication and evolutionary developmental biology .