Parthenogenesis (Partheno-genesis from the Greek παρθενος parthenos, "virgin", + γενεσις genesis, "birth") means the growth and development of an embryo or seed without fertilization by a male. Parthenogenesis occurs naturally in some species, lower plants (called agamospermy), invertebrates (e.g. water fleas, aphids), honey bees and some vertebrates (e.g. lizards, salamanders, some fish, and even turkeys[1]). Parthenogenetic populations must be all-female because there is no contribution from a male. The offspring may be capable of sexual reproduction, however, if that exists in the species. As with all types of asexual reproduction, there are both costs and benefits associated with parthenogenesis.
Parthenogenesis has nothing to do with artificial animal cloning, a process where the new organism is identical to the cell donor. Parthenogenesis is truly a reproductive process which creates a new individual or individuals from the naturally varied genetic material contained in the eggs of the mother. A litter of animals resulting from parthenogenesis may contain all unique siblings without any twins or multiple numbers from the same genetic material, but they would all be female.
Thus human beings cannot be created by parthenogenesis. This is a very useful science when it comes to production of seedless fruits. Fruits like banana and grapes are parthenocarpus.
2006-10-05 06:36:41
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answer #1
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answered by Rabindra 3
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Parthenogenesis (Partheno-genesis from the Greek παρθενος parthenos, "virgin", + γενεσις genesis, "birth") means the growth and development of an embryo or seed without fertilization by a male. Parthenogenesis occurs naturally in some species, lower plants (called agamospermy), invertebrates (e.g. water fleas, aphids), honey bees and some vertebrates (e.g. lizards, salamanders, some fish, and even turkeys[1]). Parthenogenetic populations must be all-female because there is no contribution from a male. The offspring may be capable of sexual reproduction, however, if that exists in the species. As with all types of asexual reproduction, there are both costs and benefits associated with parthenogenesis.
Parthenogenesis has nothing to do with artificial animal cloning, a process where the new organism is identical to the cell donor. Parthenogenesis is truly a reproductive process which creates a new individual or individuals from the naturally varied genetic material contained in the eggs of the mother. A litter of animals resulting from parthenogenesis may contain all unique siblings without any twins or multiple numbers from the same genetic material, but they would all be female.
In April 2004, scientists at Tokyo University of Agriculture used parthenogenesis to successfully create fatherless mice. The process could be used to reproduce humans. The alternation between parthenogenesis and sexual reproduction is called heterogamy. Forms of reproduction related to parthenogenesis but that require the presence of sperm are known as gynogenesis and hybridogenesis.
2006-10-05 06:27:36
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answer #2
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answered by Chapadmalal 5
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No. I was not.
2006-10-05 06:58:04
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answer #3
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answered by David S 5
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