Asexual reproduction is the reproduction of a single individual without the use of sex. Sex is defined as the halving of the chromosome number of an individual and its subsequent reconstitution at the fusion of the gametes (egg and sperm).
Basically asexual reproduction creates the clone of an individual as one individual copies its own genome and then splits into two individuals.
Bacteria and Archaeans (so all prokaryotes) reproduce only by asexual reproduction. Also sponges have the ability to produce a full individual if one individual is broken into two pieces, which is called regeneration. Also sea stars, sea anenomes, flatworms (etc.) are able to reproduce asexually by regeneration.
2006-11-23 16:30:47
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answer #1
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answered by mg 3
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Asexual reproduction (also known as agamogenesis) is a form of reproduction which does not involve mitosis, haploid formation, or fertilization. In laymen's terms, there is only one "cell" involved. This form of reproduction is common among simple organisms such as amoeba and other single-celled organisms, although most plants reproduce asexually as well (see vegetative reproduction).
Because it does not require male participation, asexual reproduction occurs faster than sexual reproduction and requires less energy. Additionally, asexual reproduction produces an exact replica of the parent because of the lack of genetic recombination. From an evolutionary standpoint, one could thus argue that asexual reproduction is inferior because it stifles the potential for change. However, there is also a significantly reduced chance of mutation or other complications that can result from the mixing of genes.
Many, but not all, single-celled organisms reproduce asexually through binary fission. Some single-celled organisms rely on one or more host organisms in order to reproduce, but most literally divide into two organisms. An exception to the rule are ciliates, which reproduce both sexually and asexually. All prokaryotes (the vast majority of which are unicellular) reproduce asexually. [citation needed]
There are three types of asexual reproduction utilized by plants: regeneration, vegetative reproduction, and spore formation. The last type, spore formation, involves the production of reproductive cells called spores that contain DNA and develop into a new organism after dispersal. This method of reproduction is found in the ferns, and involves sporogenesis without meiosis. Thus the chromosome number of the spore cell is the same as that of the parent producing the spores.
Examples of asexual reproduction in higher organisms
- The cape bee Apis mellifera capensis is known to sometimes reproduce asexually through a process called thelytoky.
- In the absence of a male, female Turkeys are known to produce fertile eggs. The individual produced is often sickly, and nearly always male. This behaviour can interfere with the incubation of eggs in Turkey farming[1].
- It is stated in the film Jurassic Park that some species of frogs have been known to reproduce asexually, this is in fact true as some form of frogs have been known to change gender.
You could get more information the link below...
2006-11-24 08:13:08
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answer #2
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answered by catzpaw 6
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Asexual reproduction: a reproductive process that involves only one parent and produces offspring that are identical to the parent.
Ex.1 - Bacteria. - Bacteria reproduce by a process called binary fission. During binary fission, a cell first duplicates its genetic material and then divides into two separate cell. Each new cell gets its own complete copy of the parent cell's genetic material as well as some of the parent's ribosomes and cytoplasm.
Ex.2 - Protists also reproduce by asexual reproduction.
2006-11-24 00:45:58
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answer #3
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answered by Anonymous
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asexual reproducting contrasts to sexual producting, some organisms do not need female and male genes to creat a new organism. Therefore those organisms carry the ability to create a replica of themselves at birth. That is asexual reproducting.
cloning is a form of asexual reproduction.
basically most invertibrates reproduct asexualy
2006-11-24 00:30:19
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answer #4
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answered by Anonymous
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Asexual reproduction/agamogenesis is a reproduction which does not involve mitosis, haploid formation, or fertilization.
Ex. amoeba
single-celled organisms(Archaea,Eukaryotes, Bacteria)
Cape bee(sometimes reproduce asexually through a process
called thelytoky)
Turkey !!!( yeah, it can) when there r no male turkey.
2006-11-24 00:31:44
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answer #5
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answered by Lavender B 2
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Reproduction without fertilisation
reproduction involving the body parts or cells of a single individual only.
Example:fission in amoeba
budding in yeast
2006-11-24 00:33:10
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answer #6
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answered by mst 1
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Some animals dont need a male and female to reproduce. They carry both the male and female needs to reproduce. Hope that helps you.
2006-11-24 00:26:17
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answer #7
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answered by mixedchick 2
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A single parent that produces offspring identical to itself, A Hydra is one example and the Sea star another example.
2006-11-26 20:24:20
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answer #8
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answered by cocky_whitegirl1488 1
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asexual reproduction is a type of reproduction that doesn't involve the fusion of gametes..ex. budding, fission, spore formation..
starfish, earthworms...
2006-11-24 00:31:06
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answer #9
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answered by Anonymous
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starfish, worms
2006-11-24 00:27:06
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answer #10
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answered by abcdgoodall 4
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