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Asexual in Medical News

Understanding the process of homosexual identity formation among Asian and Pacific Islander youth

...xual identity with many negative stereotypes and assumptions related to their ethnic identity. Still others sublimate their sexual identify and appear asexual until they are able to synthesize an identity that incorporates both ethnicity and sexuality. The researchers developed an API sexual minority mo...

Researchers block transmission of malaria in animal tests

...tion when they inhabit a mosquito (and are transmitted to the host) and via asexual reproduction when they reside in the human body (replication in the host). ...esearchers to break the second phase of the infection cycle and prevent the asexual reproduction of the malaria parasites that have already gained access to th...

Researchers Document First Case of Virgin Birth in Sharks

...ould be believed, but scientists could not imagine asexual reproduction among sharks. "Because it was even more difficult to imagine asexual reproduction in a shark," New Scientist quoted Pau...birth. This is the first recognized instance of an asexual reproduction in cartilaginous fish. Later, the ...

First Human Clone born

...roduced by the highly controversial technique- and announced publicly. It would also mark the beginning of a new era in human reproduction - the first asexual birth, the first time a child was produced that was not the product of a genetic mix of mother and father, but the identical reproduction of one of it...
Asexual in Biological News

Parasitic worms make sex worthwhile

...its worm parasite makes sex advantageous for the snail, whose females favor asexual reproduction in the absence of parasites, say Indiana University Bloomingto...here parasites are less common. "The parasite can infect both sexual and asexual snails," said IU evolutionary biologist Lynda Delph, who also coauthored th...

Sex involved in plant defense

... eat a variety of plants preferred to feed on the asexual species and lived longer while doing so. The r...erbivores. Though there are short-term benefits to asexual reproduction populations can grow more rapidly an...ants at a long-term disadvantage. "In the end, asexual reproduction appears to be an evolutionary dead-en...

Study finds role for parasites in evolution of sex

...em like a better way to go. Every individual in an asexual species has the ability to reproduce on its own. B...ficient? One hypothesis is that parasites keep asexual organisms from getting too plentiful. When an asexual creature reproduces, it makes clonesexact genetic ...

Study finds DNA barcoding requires caution without closer examination

...es; some of the species have multiple divergent copies of their DNA arising from past hybridization (allopolyploidy); there is a mixture of sexual and asexual reproduction; and there is possible recent species divergence. Such complications are not uncommon in many plant groups. Spooner concludes that a vari...

Is this the beginning of the end of plant breeding?

...ffspring plant has twice as much DNA as the parent generation, and has all the genes from this single parent. Thus the authors have made a form of asexual reproduction possible in a normally sexual species. Turning meiosis into mitosis is not enough to reach clonal reproduction, but it's a giant leap tow...

Reef boom beats doom

...exual reproduction and the settlement and growth of new corals arriving from other reefs. This study demonstrates that for fast-growing coral species asexual reproduction is a vital component of reef resilience" says Dr Sophie Dove, also from CoECRS and The University of Queensland. "Coral reefs globally...

The story of X -- evolution of a sex chromosome

...lost, and the Y shrinks. "If you have no recombination, natural selection is less effective at removing detrimental genes," said Bachtrog. "Y is an asexual chromosome, and it pays a price for that: It keeps losing genes." Bachtrog, whose career has revolved mostly around the study of the degeneration o...

How increased UV exposure impacts plants

...ublished in the Journal of Natural Resources and Life Sciences Education . The lab exercise focused on ultraviolet radiation impacts on liverwort asexual propagules, and students were required to formulate and test a hypothesis based on background reading related to impacts of ultraviolet radiation on e...

Tiny invasive snail impacts Great Lakes, alters ecology

...animal from outside influences. In New Zealand, the snails reproduce asexually, resulting in identical clones, or sexually. However, in invaded areas, asexual cloning is the only mode of reproduction. This mud snail spread to England as early as 1850 and Europe in the late 1800s. It is found in Japan, b...

All eyes and ears on the corn genome

...brings us one step closer to our goal of understanding the functional genetic components that influence hybrid vigor, drought and pest resistance, and asexual plant reproduction or apomixis - all special traits that make corn valuable," said James Collins, head of the Biological Sciences Directorate at the N...
Asexual in Biological Technology

Fact and friction: Putting election-year stem cell claims under the microscope

...n human cloning, so it's silly to suggest he aspires to create a mini-Frankenstein. But he supports what is called "therapeutic cloning," which is the asexual reproduction of stem cells to make other stem cells for research purposes. Green and others say therapeutic cloning is tantamount to cloning a huma...
Asexual in Biological Definition

Reproduction

...erial. These organisms have two different adult sexes, male and female. asexual reproduction is a biological process by which an organism creates a geneti...roduce. Most plants are capable of vegetative reproduction . Other ways of asexual reproduction are binary fission , fragmentation and spore formation . ...

Eukaryote

...yotic DNA is divided into several bundles called chromosomes , which are separated by a microtubular spindle during nuclear division. In addition to asexual cell division, most eukaryotes have some process of sexual reproduction via cell fusion, which is not found among prokaryotes. A typica...

Fungus

...cture 3 Reproduction 3.1 Sexual 3.2 asexual 4 Nutrition and ecology 4.1 Pathoge...ually and/or sexually. Aerial hyphae often produce asexual reproduction propagules termed conidia (synonymo...ia , with several spores on the end of each. asexual Fungi may also reproduce asexually, for instance...

Lichen

...ns of reproduction for most lichen, though it is more common in basidiomycetous lichens since they appear to lack structures specifically designed for asexual reproduction. Spores are produced in spore producing bodies, the three most common spore body types are the apothecia , perithecia and the pycni...

Meiosis

... animals this is often the primary or only means of proliferation. In other eukaryotes , sexual reproduction may play a more restricted role, while asexual reproduction gains emphasis (examples include plants and hydras ). The mechanistic differences between mitosis , which produces somatic cells...

Mutational meltdown

...'s Ratchet and mutational meltdowns. Evolution 47: 1744-1757. M. Lynch, R. Burger, D. Butcher, and W. Gabriel (1993). The mutational meltdown in asexual populations. J. Hered. 84: 339-344. M. Lynch and W. Gabriel (1990). Mutation load and the survival of small populations. Evolution 44: 1725-1...

Natural selection

...s, although more recent scientific discoveries in genetics explain several mechanisms that occur in the process of reproduction: in the case of both asexual and sexual reproduction, random mutation (including DNA transcription errors); in the case of sexual reproduction (which mixes the DNA of two pare...

Parthenogenesis

...ns are typically all-female. As with all types of asexual reproduction , there are both costs and benefits a... Contents showTocToggle("show","hide") 1 asexual versus sexual reproduction 2 Parthenogenesis ... 6 References 7 External links asexual versus sexual reproduction Asexuality is relativ...

Prokaryote

...rane-bound nucleus, but may also have various small circular pieces of DNA called plasmids spread throughout the cell. Reproduction is exclusively asexual , through binary fission , where the chromosome is duplicated and attaches to the cell membrane, and then the cell divides in two. However, they sho...

Red Queen

...re sexual is that sex increases the rate at which adaptation can occur. This is for two reasons. First, if an advantageous mutation occurs in an asexual line, it is impossible for that mutation to spread without wiping out all other lines, which may have different advantageous mutations of their own. ...
Asexual in Biological Dictionary

Asexual

An article explaining the different types of asexual people and societal views on asexuality. Asexual reproduction is reproduction which does not involve meiosis, ploidy reduction, or fertilization. Only one parent is involved in asexual reproduction. A more stringent definition is aga...

Sporangiophore

...d sporangiophores and the obvious sporangiphore shield. one sporangiophore with meiosporangia on undersides of sporangiophore shield ... The asexual fruiting structure (the sporangiophore ) of Pilobolus species is unique. ... The sporangiophore has the remarkable ability of orienting itself t...

Sexual reproduction

...olutionist is faced with the problem of how sexual reproduction arose in the first place and how it is maintained given the obvious advantages of asexual ... ...

Seed plant

...nant land ... Sometimes, as in apples, the part of the plant ... Walks plant enthusiasts though the steps and techniques for the sexual and asexual propagation of plants . ... Many ornamental plants do not come "true" from seed . ... ...

Reproduction

... many ways that animals can reproduce through asexual reproduction . ... Sexual reproduction require...chnology, and ... ... of reproduction are ... asexual reproduction is the process by which an organism ... of asexual reproduction include parthogenesis, fragmentati...

Parthenogenesis

... Parthenogenesis is an asexual form of reproduction found in females where growth and development of em... explanation but could not be certain. ... Parthenogenesis , a form of asexual reproduction in which a new organism develops ... Parthenogenesis - Can ...

Moneran

...more ... Information about moneran in the free online English dictionary and encyclopedia. ... moneran - organisms that typically reproduce by asexual budding or fission and ... Learn and research science, biology, chemistry, electronics, mathematics, space, terminology and much more. ... mone...

Homospory

...glish dictionary and ... homospory - the development of a single kind of asexual spores ... Note: click on a word meaning below to see its connections a..... Noun: homospory hu'mó-spu-ree. The development of a single kind of asexual spores ... homospory . homostyled. homostylic. homostylous. homotherm. ho...

Filial generation

... as F1... Definition of filial generation (first) in the ... from filial generation (first) ... or stage in the life cycle of an organism: asexual generation of a fern. ... Information about filial in the free online English dictionary and encyclopedia. ... filial - designating the gen...

Fecundity

...emography, fecundity is the potential reproductive capacity of an organism or population, measured by the number of gametes (eggs), seed set or asexual propagules. Fecundity is under both genetic and environmental control, and is the major measure of... fecundity n. The quality or power of pro...
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