asexual

Definitions

  • WordNet 3.6
    • adj asexual not having or involving sex "an asexual spore","asexual reproduction"
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Webster's Revised Unabridged Dictionary
    • Asexual (Biol) Having no distinct sex; without sexual action; as, asexual reproduction. See Fission and Gemmation.
    • Asexual not involving sexual activity or sexual attraction; as, an asexual friendship.
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Century Dictionary and Cyclopedia
    • asexual Not sexual; not sexed; having no sex, as a species or other group of animals which have no sexual system or organs.
    • asexual Neuter; being of neither sex, as some individuals of species in which other individuals are male or female, or as some stages in the growth of individuals which later develop into male or female.
    • asexual Effected or produced by other than sexual processes; agamic; agamogenetic: as, asexual reproduction.
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Chambers's Twentieth Century Dictionary
    • adj Asexual a-seks′ū-al without sex, once applied to cryptogams—agamic.
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Etymology

Webster's Revised Unabridged Dictionary
Pref. a-, not + sexual,
Chambers's Twentieth Century Dictionary
Gr. a, neg., and Sexual.

Usage

In literature:

In order to bring about asexual reproduction, e.g.
"Darwin and Modern Science" by A.C. Seward and Others
So far for asexual methods of reproduction.
"Scientific American Supplement, Vol. XXI., No. 531, March 6, 1886" by Various
PARTHENOGENESIS, name given to asexual reproduction, that is, to reproduction of plants or animals by means of unimpregnated germs or ova.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood
Sexless or asexual reproduction assumes various forms.
"Taboo and Genetics" by Melvin Moses Knight, Iva Lowther Peters, and Phyllis Mary Blanchard
Under such changed conditions a complex organism, if only asexually propagated, would become extinct.
"Darwinism (1889)" by Alfred Russel Wallace
There still remains to be considered the plants that are propagated asexually, like potatoes and all our cultivated fruits.
"Trees, Fruits and Flowers of Minnesota, 1916" by Various
There is, however, one difference between beings produced sexually and asexually, which is very general.
"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin
In all of her lowest plants and animals she uses the asexual method of reproduction.
"The Meaning of Evolution" by Samuel Christian Schmucker
The asexual part of the life-cycle was first described by Th.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5" by Various
Reproduction sexual or asexual.
"Student's Hand-book of Mushrooms of America, Edible and Poisonous" by Thomas Taylor
Asexual reproduction only in Naids.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7" by Various
Asexual reproductive cells which arise by division, remain united and become tissue cells.
"A Mechanico-Physiological Theory of Organic Evolution" by Carl Von Nägeli
These merozoites infect new corpuscles and thus the asexual cycle is continued.
"Handbook of Medical Entomology" by William Albert Riley
When I was big, I was invisible and totally asexual.
"Makers" by Cory Doctorow
Reproduction is mainly asexual, the females producing living young without the agency of a male.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10" by Various
This animal, which has been found in N. America and in Germany, possesses both an asexual hydroid and a sexual medusoid generation.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
Sexual reproduction by oogonia and antheridia; asexual reproduction by zoospores or conidia.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3" by Various
After asexual multiplication has gone on for some time, sexual forms become developed.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7" by Various
This is a kind of asexual reproduction.
"A Civic Biology" by George William Hunter
They reproduce principally by asexual budding of parent leaflike fronds.
"Significant Achievements in Space Bioscience 1958-1964" by National Aeronautics and Space Administration
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In news:

Asexual , All-Female Animal's Survival Trick: DNA Hijacking.
Despite his sexual "urges," Tim Gunn identifies as asexual .
One in 100 adults asexual .
About one percent of adults have absolutely no interest in sex, according to a new study, and that distinction is becoming one of pride among many asexuals.
The Third Phase of the Asexuality Movement.
Oprah Radio host Dr Laura Berman talks about whether there is such a thing as asexuality , or if it's low libido and lack of attraction.
Plants can be propagated by sexual or asexual means.
Multiplying of plants from vegetative plant parts such as shoots, roots and leaves or bulbs and corms is called asexual propagation .
Spongebob Squareparents has been described his creator as an asexual oddball.
Many asexual creatures are thought to be doomed to extinction due to the lack of genetic diversity and build-up of mutations that often come with reproducing from just one parent's DNA.
But bdelloids have managed to avoid such pitfalls of asexual life, diversifying into at least 400 species.
It was shown previously in the ascomycetous fungus Aspergillus nidulans that asexual sporulation is stimulated and sexual development repressed by red light.
Asexual, All-Female Animal's Survival Trick: DNA Hijacking .
They are denied education because it is assumed, incorrectly, that they are asexual.
The Pros and Cons of Asexual Reproduction.
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In science:

There seems to be no biological justification either for a VB population to be of a much higher size than a VA population, if both are simulated with the same value for P opmax, or for an asexual variety to grow larger than a sexual one of the same species.
Random deaths in a computational model for age-structured populations
For an asexually reproducing population without recombination, the general derivation of the theorem is straightforward: Let pi be the frequency of genotype i in the population, and Wi its fitness.
Biological Evolution and Statistical Physics
We consider only haploid models with asexual reproduction, as is appropriate for macromolecules.
Biological Evolution and Statistical Physics
Muller first pointed out that small asexual populations might be at a high risk of accumulating deleterious mutations.
Biological Evolution and Statistical Physics
So far, we have mainly discussed asexual species.
Biological Evolution and Statistical Physics
Computer simulations of a model with a host population consisting of sexual and asexual individuals are reviewed by Hamilton et al .
Biological Evolution and Statistical Physics
In this model, sexual individuals produce only half as many offspring as asexual individuals; mutation causes the switching between the two modes of reproduction.
Biological Evolution and Statistical Physics
The parasite genome is characterized by k binary loci, and the host genome by nk binary loci, with k loci for each parasite, and by an additional locus determining whether reproduction is sexual or asexual.
Biological Evolution and Statistical Physics
This Darwinian preselection of the fittest sperm cell does not exist for asexual reproduction and may justify the existence of men.
The Penna Model of Biological Aging
Sexual, as opposed to asexual, reproduction allows a new way to escape the detrimental effects of bad mutations.
The Penna Model of Biological Aging
If we have two bit-strings of length 8 in the asexual case then 00010000 is clearly more favorable for survival than 11101111.
The Penna Model of Biological Aging
Consider a population of asexual haploid individuals, with a population size N that is constant over time.
Evolutionary game dynamics in phenotype space
Now that the reader may have understood the complementarity principle, what are the consequences of this possible survival strategy via complementarity? Also, complementarity is an advantage of sexual reproduction compared to the asexual haploid case where complementarity is impossible.
Review of haplotype complementarity under mutational pressure
In their approach they apply an asexual reproduction scheme, which means the offspring are only produced by one parent – not unlike bacteria – and not by two parents as used in a traditional GA.
Fitting of dust spectra with genetic algorithms - I. Perspectives & Limitations
In addition they observed that the strength of epistatic interactions is weaker in sexual organisms than in asexual ones and that the reproductive mode has a significant effect on the evolution of the genetic architecture.
The Emergence of Modularity in Biological Systems
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