why humans not reproduce asexually ?
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Most organisms that reproduce asexually are single-celled and reproduce by binary fission, but these are not nowadays classified as animals, much less vertebrates, much less mammals, much less human.
Some multi-celled animals such as some species of annalids (worms), though hermaphroditic and usually reproduce sexually, sometimes reproduce asexually through fragmentation; that is the organism fragments and each fragment becomes a new organism.
Hydras (related to jellyfish and starfish) reproduce by budding. Genetically identical polyps form that break off from the parent and become new organisms.
I hope that the reader can see that the 3 above listed forms of asexual reproduction would be highly inconvenient for a large and complex vertebrate animal such as a human. I mean, really…
What does that leave? Parthenogenesis. In some (not all) lower vertebrates species, such as copperhead snakes, females are able to reproduce this way, even in the presence of males.
Parthenogenesis has never been observed to occur naturally in mammals, but something rather similar has been induced in mice, with (please note) a high degree of manipulation by humans.
Some multi-celled animals such as some species of annalids (worms), though hermaphroditic and usually reproduce sexually, sometimes reproduce asexually through fragmentation; that is the organism fragments and each fragment becomes a new organism.
Hydras (related to jellyfish and starfish) reproduce by budding. Genetically identical polyps form that break off from the parent and become new organisms.
I hope that the reader can see that the 3 above listed forms of asexual reproduction would be highly inconvenient for a large and complex vertebrate animal such as a human. I mean, really…
What does that leave? Parthenogenesis. In some (not all) lower vertebrates species, such as copperhead snakes, females are able to reproduce this way, even in the presence of males.
Parthenogenesis has never been observed to occur naturally in mammals, but something rather similar has been induced in mice, with (please note) a high degree of manipulation by humans.
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human doesnot produce asexually because in asexual reproduction there is no fusion of gamets but we have to fuse the gamets for reproduction in human because there are chromosomes present in human body
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