parthenogenesis
parthenogenesis The development of an individual from an egg without that egg undergoing fertilization. It occurs in some groups of animals (e.g. flatworms, leeches, aphids, rotifers), in which males may be absent. The eggs (ova) that develop in this way are usually
diploid, so all offspring are genetically identical with the parent. Commonly, parthenogenesis with only females in the population alternates with ordinary sexual reproduction, which allows the recombination of genetic material and presents a need for males. This alternation is called heterogamy.
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Parthenogenesis through five generations in the scorpion Liocheles australasiae (Fabricius 1775) (Scorpiones, Ischnuridae).(SHORT COMMUNICATION)
Magazine article from: Journal of Arachnology; 9/1/2005; ; 700+ words
; ...generation or subsequent generations by parthenogenesis. Keywords: Thelytokous parthenogenesis, successive generations, histological...world (Fet et al. 2000), thelytokous parthenogenesis has been reported only in seven species...
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Thelytokous Parthenogenesis in Unmated Queen Honeybees (Apis mellifera capensis): Central Fusion and High Recombination Rates
Magazine article from: Genetics; 9/1/2008; ; 700+ words
; ...develop into females via thelytokous parthenogenesis involving central fusion of meiotic...into haploid males by arrhenotokous parthenogenesis. Unfertilized eggs are produced by...1943; Tucker 1958), in a form of parthenogenesis known as thelytoky. Thelytoky is...
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Parthenogenesis: New work by James MacMillan
Newspaper article from: The Scotsman; 9/11/2000; ; 700+ words
; ...issues. His new music theatre piece, Parthenogenesis - which receives its first performance...triggered virgin birth, also known as parthenogenesis. Symmons Roberts - a former editor...process, he says, and at the heart of Parthenogenesis there is a strong literal musical...
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Researchers Obtain Variety of Primate Cells Via Parthenogenesis.
Newspaper article from: Biotech Week; 2/13/2002; 700+ words
; ...stem cells through a process called parthenogenesis. The researchers reported that they...capabilities of primate stem cells derived by parthenogenesis." The cell line has grown continuously...mother and a sperm from the father. Parthenogenesis is defined as a process by which embryonic...
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Meiotic Parthenogenesis in a Root-Knot Nematode Results in Rapid Genomic Homozygosity
Magazine article from: Genetics; 7/1/2007; ; 700+ words
; ...hapla reproduce by facultative meiotic parthenogenesis. Sexual crosses can occur, but...chromatids. With this mechanism, meiotic parthenogenesis would be expected to result in rapid...importance reproduce solely by mitotic parthenogenesis and have various degrees of polyploidy...
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Confirmation of parthenogenesis in Tityus trivittatus kraepelin 1898 (Scorpiones, Buthidae).(SHORT COMMUNICATION)
Magazine article from: Journal of Arachnology; 9/1/2005; ; 700+ words
; ABSTRACT. The parthenogenesis in Tityus trivittatus Kraepelin...reproduction. The possibility of parthenogenesis in Tityus trivittatus was first...the existence of facultative parthenogenesis in this species. However, as...
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Reproduction by parthenogenesis attained in mice.
Newspaper article from: Biotech Week; 5/12/2004; 505 words
; ...Researchers have produced live mice by parthenogenesis. That means no sperm, no male chromosomes...insects and reptiles can reproduce by parthenogenesis, in which the unfertilized egg retains...In mammals, though, successful parthenogenesis has been regarded as virtually impossible...
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Powerful 'Parthenogenesis' gives birth to a surreal, fiery vision
Newspaper article from: Daily Breeze; 2/26/2003; ; 700+ words
; ...Arts' Zipper Hall, only one, "Parthenogenesis" by James MacMillan, spoke with...actress and chamber ensemble," "Parthenogenesis." Premiered in 2000, the work offers...spontaneous pregnancy (an act of parthenogenesis). It resulted in the birth of a...
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Parthenogenesis
Newspaper article from: The Scotsman; 8/20/2001; ; 355 words
; ...THERE'S no escaping the topicality of James MacMillan's Parthenogenesis, which the composer conducted in its Scottish premire...and blood type to her mother. The doctors said it was parthenogenesis - non- sexual reproduction brought on by the shock blasts...
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International Stem Cell Corporation CEO Issues Statement on De-Differentiation Research and Parthenogenesis.
Business Wire; 11/25/2007; 700+ words
; ...differentiation process, the stem cell lines produced by ISCO's Parthenogenesis process do not employ the use of any cancer causing genes or the...forward-looking statements. Key Words: Stem Cells Biotechnology Parthenogenesis
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Parthenogenesis
Encyclopedia entry from: The Gale Encyclopedia of Science
Parthenogenesis Parthenogenesis in animals refers to reproduction in which a new individual...seed formation without fertilization, is called agamospermy. Parthenogenesis is viewed as an aberration of sexual reproduction because animals...
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parthenogenesis
Book article from: The Columbia Encyclopedia, Sixth Edition
parthenogenesis [Gr.,=virgin birth], in biology...without fertilization. Natural parthenogenesis has been observed in many lower...to the mother. The phenomenon of parthenogenesis was discovered in the 18th cent...
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Biology: Beginnings of Bioengineering
Book article from: American Decades
...1924 at the Rockefeller Institute. Loeb and Parthenogenesis Parthenogenesis is the process whereby an egg is induced to...1920s and 1930s he experimented on artificial parthenogenesis in mammals and even claimed to have produced...
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Life
Book article from: -Ologies and -Isms
...Also called ontogenesis . —ontogenic , adj. parthenogenesis Biology. the development of an egg or seed without fertilization...generation abiogenesis. unigenesis asexual reproduction; parthenogenesis. —unigenetic , adj. vitalism 1. Philosophy...
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Rotifera
Book article from: Animal Sciences
...grind up their food. Another unusual rotifer trait is parthenogenesis, an asexual mode of reproduction in which females produce...females return to producing unfertilized eggs. Because parthenogenesis is rare, rotifers provide valuable clues to biologists...
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