Examples of use of asexual reproduction
1. Asexual reproduction is common in some insect species, rarer in reptiles and fish, and has never been documented in mammals.
2. In asexual reproduction, an egg splits in two and DNA contributed from the mother doubles, so each resulting egg has a full complement of chromosomes from the female.
3. Asexual reproduction among sharks is more likely to happen in captivity, when there is no other option for reproduction, than in the wild, Hueter said.
4. A recent study had documented the first confirmed case of asexual reproduction, or parthenogenesis, among sharks: a pup born at a Nebraska zoo came from an egg that developed in a female shark without sperm from a male.
5. The paper‘s lead author, Demian Chapman, who did the genetic analysis while pursuing his doctorate at Nova Southeastern and now directs the shark program at the Pew Institute for Ocean Science, said the reduced genetic variability might pose a problem over time if males become scarce under intense fishing pressure and females resort to asexual reproduction.