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Asexual in Medical News

Researchers block transmission of malaria in animal tests

... 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). ... to break the second phase of the infection cycle and prevent the asexual reproduction of the malaria parasites that have already gained access to ...

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

... 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 ...

Researchers Document First Case of Virgin Birth in Sharks

... 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 ... This is the first recognized instance of an asexual reproduction in cartilaginous fish. Later, the ...

First Human Clone born

... 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 ...
Asexual in Medical Dictionary

Alopecia

... distressing side effects with associated changes in body image. Loss of pubic hair can also be particularly uncomfortable, which, in turn, promotes asexual feelings. People with this condition repeatedly and incessantly pull out their hair , one strand at a time, from the roots. They most often pull ...

Erythrocyte

... levels of blood urea nitrogen and creatinine , two chemicals that reflect kidney function ... Sporozoites enter erythrocyte s and undergo asexual reproduction (budding). In the blood , some parasites differentiate into male and female gametes although these cannot be distinguished at the ...

Whitehead

... Barbara Dafoe Whitehead , American Enterprise, 1 January 1998: According to psychologist Joanna Gutmann, a counselor at the University of Chicago, asexual couplings are increasingly common. common inflammatory disease of the hair follicles and sebaceous glands characterized by blackheads , ...
Asexual in Biological News

Sex involved in plant defense

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

Study finds role for parasites in evolution of sex

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

A special issue of the International Journal of Plant Sciences

... mating patterns and gender strategies, and asexual reproduction and polyploidy. The focus of the ... system diversity. In the final section, asexual Reproduction and Polypoidy, Jonathan Silverton begins by evaluating the costs and benefits of asexual and sexual reproduction in plant species that ...

The benefits of 80 million years without sex

... years without sex. Bdelloid rotifers are asexual organisms, meaning that they reproduce without ... in their natural environment. Although other asexual organisms are known, they are thought to become ... this evolutionary trick has been shown in any asexual animal. Dr. Alan Tunnacliffe commented on the ...

Parasitic worms make sex worthwhile

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

Study finds DNA barcoding requires caution without closer examination

... 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 ...

Is this the beginning of the end of plant breeding?

... 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 ...

Reef boom beats doom

... 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 ...

The story of X -- evolution of a sex chromosome

... 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 ...

How increased UV exposure impacts plants

... 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 ...

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Asexual in Biological Technology

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

... 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 ...
Asexual in Biological Definition

Fungus

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

Parthenogenesis

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

Reproduction

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

Reproduction

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

Eukaryote

... 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 ...

Lichen

... 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 ...

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 ...

Mutational meltdown

... 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: ...

Natural selection

... 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 ...

Prokaryote

... 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 ...

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Asexual in Biological Dictionary

Reproduction

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

Binary fission

... , or prokaryotic fission , is the form of asexual reproduction and cell division used by all ... cell. binary fission n. A method of asexual reproduction that involves the splitting of a ... and ... Binary fission is the form of asexual ....

Asexual

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

Asexual reproduction

... asexual reproduction is reproduction which does not ... or fertilization. Only one parent is involved in asexual reproduction . A more stringent definition is ...ethods... An introduction to the mechanisms of asexual reproduction in animals. ... In ...

Apomixis

... of the normal sexual reproduction by asexual reproduction, without fertilization . Thus "normal asexual reproduction" of plants, such as ... a form of apomixis . ... Apomixis --The asexual Revolution ... Angiosperm apomixis , or ...

Parthenogenesis

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

Homospory

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

Budding

... Budding is a form of asexual reproduction. ... Budding is the process by which enveloped viruses ... the finer points of the technique of ... Budding is a form of asexual reproduction carried out by individuals who are ... Offspring created ...

Sporangiophore

... 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 ...

Sexual reproduction

... 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 ... ...

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