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Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction from either unicellular or multicellular organisms inherit the full set of genes of their single parent and thus the newly created individual is genetically and ...
Parthenogenesis is a form of asexual reproduction in which growth and development of embryos occur without fertilization. In animals, parthenogenesis means development of an embryo from an unfertilized egg cell. The first all-female (unisexual) reproduction in vertebrates was described in the Amazon molly in 1932. [33]
Metacercariae of Clinostomum phalacrocoracis in fish [2] Bucephalid cercaria larva from Ernst Haeckel's Kunstformen der Natur (1904): The tail's furcae give the impression of horns, hence the genus name Bucephalus meaning "ox head". While the details vary with each species, the general life cycle stages are:
The asexual cycle includes the formation of spore containing sporangia borne on the top of sporangiophores that may extend 10 to 15 cm above the surface of the fungal colony from which they emerged. The long filamentous sporangiophores respond to divergent environmental signals including light, gravity, wind, chemicals and adjacent objects.
Gynogenesis, a form of parthenogenesis, is a system of asexual reproduction that requires the presence of sperm without the actual contribution of its DNA for completion. The paternal DNA dissolves or is destroyed before it can fuse with the egg. [ 1 ]
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Cyprinus rubrofuscus, the Amur carp, is a species of cyprinid fish, and is the wild form of the well-known koi.It is widespread in the fresh waters of eastern Asia, native to China, Korea, Russia, Vietnam and Laos from the Amur to Red River basins, and has also been introduced outside its native range. [1]
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