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Chimera (genetics) - Wikipedia, the free encyclopedia For example, the chimera may have a liver composed of cells with one set of chromosomes and have a kidney composed of cells with a second set of chromosomes. Chimeras should not be confused with hybrids, which are organisms formed from two gametes (each from a different species) which result in a single zygote. Chimeras should also not be confused with mosaics, which are organisms with genetically different cell types, but which again originate from a single zygote. en.wikipedia.org /wiki/Chimera_(genetics)   (1441 words)

Genetics and Society: Past News: The Other Stem-Cell Debate That said, all modern genetic research, including the sequencing of the human genome itself, underscores how trivial the biological difference really is between a human being and the rest of life. The reason Zanjani's chimeras look like perfectly ordinary sheep is that he injected them with stem cells in a late stage of their fetal development, when their body plans were already laid down. Moreover, for a human embryo to be conceived, the chimeras would have to be born first in order to mate, and Brivanlou says he has no intention of allowing them to come to term. www.genetics-and-society.org /newsdisp.asp?id=753   (4591 words)

evolgen archive: Chimera These chimera aren’t structurally different (i.e., it is still the same protein), but instead of the normal regulatory elements associated with the gene, it now has the yeast UAS. These fusion proteins are a chimera of the coding sequence of a gene of interest and some label (often times a fluorescent protein such as green fluorescent protein, a.k.a. Hybridization has the potential to induce speciation, and these species can be thought of as a chimera of the two parent species (yes, I do realize that I’m stretching the concept of chimera a bit here). evolgen.blogspot.com /2005/05/chimera.html   (956 words)

Genetics and Society: Past News: Animal-Human Hybrids Spark Controversy A chimera is a mixture of two or more species in one body. For example, an experiment that would raise concerns, he said, is genetically engineering mice to produce human sperm and eggs, then doing in vitro fertilization to produce a child whose parents are a pair of mice. She believes a ban should also be put into place in the U.S. Creating chimeras, she said, by mixing human and animal gametes (sperms and eggs) or transferring reproductive cells, diminishes human dignity. www.genetics-and-society.org /newsdisp.asp?id=706   (1091 words)

Mosaicism and Chimerism In mythology, a chimera is a fire-breathing monster composed with a lion's head, a goat's body and a serpent's tail. A variable fraction of all their cells that are derived from hematopoietic stem cells (peripheral blood cells, Kupffer cells in the liver, lymphocytes and macrophages in lymph nodes and spleen, etc) are from the twin. It is possible, for example to construct a goat-sheep chimera such that a goat fetus is "encased" in a sheep placenta. arbl.cvmbs.colostate.edu /hbooks/genetics/medgen/chromo/mosaics.html   (1233 words)

[No title] In medical parlance, Jane is a tetragametic chimera, a person whose body is made up from two genetically distinct lines of cells derived from a total of four gametes - eggs and sperm. Nature reported a similar case to Jane's in 1979, when genetic tests suggested that a woman could not be the mother of any of her four children. For example, one girl was discovered to be a chimera because her eyes were different colours, one brown, the other hazel. www.katewerk.com /chimera.html   (2565 words)

Chimerical and Deoxyribo Nucleic Acid (dna)   (Site not responding. Last check: 2007-11-04) Chimera Chi·me·ra or Chi·mae·ra : n 1: (Greek mythology) fire-breathing she-monster with a lion's head, goat's body and serpent's tail. patent application was discovered for a chimera ("ch" has a "k" sound) involving a pig-human... Chimera (pronounced KI-mera) A chimera is any hybrid... expage.com /posies2   (317 words)

Center for Bioethics - University of Minnesota   (Site not responding. Last check: 2007-11-04) Chimeras are animals composed of cells that originate from two (or more) different species. In the research lab, chimeras are created by introducing cells from one species into the developing embryo or fetus of another. If a female chimera with human ova (egg cells) mated with a male chimera with human sperm cells, scientists believe that it would be possible for a human fetus to be the result. www.bioethics.umn.edu /resources/topics/chimeras.html   (2722 words)

Facilities - Department of Genetics   (Site not responding. Last check: 2007-11-04) The Department of Genetics is housed in 40,000 sq. The Center is responsible for clinical genetic activities in the hospital and is the focal point for research activities in human genetics within the Department and throughout the medical center. The team of specialists at the Center for Human Genetics is supported by the state-of-the-art technologies of the Center for Human Genetics Laboratory, which enable the Center's genetics experts to focus on prenatal screening, clinical cytogenetics and molecular diagnostic testing. genetics.case.edu /facilities.php   (2418 words)

deseretnews.com | Human chimera: weird genetics The resulting chimera can possess organs with different sets of chromosomes, such as a liver composed of cells with one set of chromosomes and a kidney of cells with another set. After lengthy investigation it was concluded that Jane is a chimera, a mixture of two non-identical-twin sisters that had fused in the womb. Bizarrely, some researchers now believe we're all chimeras of a sort, not pure-bred individuals but "teeming with cells from our mothers, maybe even from grandparents and siblings," says "New Scientist." During pregnancy, the blood of mother and fetus are kept separate, but some cells manage to slip through. deseretnews.com /dn/view/0,1249,595060416,00.html   (638 words)

Chi-Dependent Intramolecular Recombination in Escherichia coli -- Friedman-Ohana et al. 148 (2): 545 -- Genetics Substrates were released from infecting chimera phage by in vivo restriction, and samples were taken at the indicated times after infection. Cells were infected by chimera phage harboring intramolecular recombination substrates (A) or linear fragments with no terminal or internal repeats (B). Genetics, June 1, 2001; 158(2): 527 - 540. www.genetics.org /cgi/content/full/148/2/545   (5735 words)

CiteULike: Tag genetics   (Site not responding. Last check: 2007-11-04) Genetic signatures of strong recent positive selection at the lactase gene. Genetics, epidemiology, and cancer disparities: is it fl and white? The genetic basis of larval resistance to a host plant toxin in Drosophila sechellia. www.citeulike.org /tag/genetics   (1105 words)

GSCI 104A Biology in the Movies The definition of a genetic disease in terms of a mutation or change in DNA sequence. The processes involved in preimplantation genetic screening/diagnosis, including in vitro fertilization, sampling cells from the embryo, and testing for the presence of the mutation. The philosophy of genetic determinism and the emergence of a GATTACA-type society, i.e., what kinds of databases would be needed to establish the genetic bases of behavioral, mental and physical traits. csm.jmu.edu /biology/rosecs/gsci104topics.html   (1227 words)

gene duplication J Piskur (2001), "Origin of the duplicated regions in the yeast genomes", Trends in Genetics, 17(6):302-303. TJ Gibson, J Spring (1998), "Genetic redundancy in vertebrates: polyploidy and persistence of genes encoding multidomain proteins", Trends in Genetics, 14:46-49. At each locus, genetic drift during the tetrasomic phase might result in the loss of alleles inherited from one of the progenitor species, or alleles from both progenitors might be retained. www.nslij-genetics.org /duplication   (12651 words)

Mehrdad Rahmaniyan To engage in clinical or laboratory research in the fields of Human Genetics, Biochemistry, Neuroscince, Pharmacology and Pathology. The findings suggested that the mechanism of chimera in this case was the fusion of two embryos. Molecular genetic analysis on patients with spinal muscular atrophy using PCR to determine the mutation in the gene. www.poultryscience.org /cv/mrahmani.htm   (454 words)

Chimeras Among Us - Biology The realm of mythology yields the classical Greek chimera, which is typically female and comprised of a lion, goat, and fire-breathing serpent. Egyptian deities are commonly represented as chimeras of one form or another. By a more technical interpretation of chimera, the mixing of tissues or cells, either through genetic engineering, transplants or grafting to produce an organism or even an organ, qualifies as a chimera. www.bellaonline.com /articles/art35905.asp   (561 words)

Genetics and Health » 2005 » September In Greek Mythology, Chimera was the offspring of Typhon and Echidna; a fire-breathing she-monster with a lion’s head and a goat’s body and a serpent’s […] In a small study of 105 fl boys and 156 white boys, researchers found that genes on the Y chromosome affect blood pressure starting at the age at which boys experience the biggest spurt in growth. A recent study touted as the largest genetic linkage study thus far on multiple sclerosis (MS) used the latest technology to scan the entire human genome. www.geneticsandhealth.com /2005/09   (692 words)

Free Association: Provencal chimera My neighbor Noriko Cuevas found this intergeneric rosemary-lavender hybrid in her garden and it is now growing in mine. I think it might be a chimera since each stem produces two kinds of leaf, short rosemary-scented ones and long, lavender-scented ones. If it is a hybrid and not a chimera I would be interested to know whether combining the metabolisms of these two classic fragrant Lamiaceae produces any new terpenes. blogs.nature.com /ng/freeassociation/2006/05/provencal_chimera.html   (251 words)

Genetic Analysis of a Poliovirus/Hepatitis C Virus Chimera: New Structure for Domain II of the Internal Ribosomal Entry ... Genetic Analysis of a Poliovirus/Hepatitis C Virus Chimera: New Structure for Domain II of the Internal Ribosomal Entry Site of Hepatitis C Virus -- Zhao and Wimmer 75 (8): 3719 -- The Journal of Virology Genetic Analysis of a Poliovirus/Hepatitis C Virus Chimera: New Structure for Domain II of the Internal Ribosomal Entry Site of Hepatitis C Virus Rieder, E., Xiang, W., Paul, A., Wimmer, E. Analysis of the cloverleaf element in a human rhinovirus type 14/poliovirus chimera: correlation of subdomain D structure, ternary protein complex formation and virus replication. jvi.asm.org /cgi/content/abstract/75/8/3719   (593 words)

Joseph Takahashi, Ph.D. We have initiated a genetic approach to study the mechanism of circadian rhythms in mammals using the mouse as a model organism. The delineation of this circadian gene pathway should eventually lead to an understanding of how circadian clocks function and their environmental regulation. Chimera analysis of the Clock mutation in mice shows that complex cellular integration determines circadian behavior. www.northwestern.edu /neurobiology/faculty/takahashi.html   (285 words)

PrimeZone Media Network   (Site not responding. Last check: 2007-11-04) Chimera President Ken Chua stated, "The whole Chimera team is extremely proud of being able to deliver accelerating news and business results to our shareholders and the investment community. Chimera's Costa Rica-based operations partner, E-Network, reports significant traffic, account registrations and wagering at http://www.724SportsBook.com in its first full weekend of operation. In case you are not familiar with the company, Chimera Technology Corp. is a Nevada-based I-gaming software and e-commerce services company competing in the more than $6 billion annual online gaming marketplace, projected to be more than $10 billion by 2004, according to Computer Almanac Industry. www.primezone.com /pages/news_releases.mhtml?d=52829   (1358 words)

Mechanism for a transcriptional activator that works at the isomerization step -- Dove et al. 97 (24): 13215 -- ... chimera; no stimulation was detected in the presence of excess chimera either in the absence or the presence of a chimera, the transcriptional effects of which should be limited www.pnas.org /cgi/content/full/97/24/13215   (3566 words)

[Chimera-users] OS X Native   (Site not responding. Last check: 2007-11-04) Hi, We're using Chimera for educational purposes for a university program aimed at high school teachers and students. I love the program, but am a bit frustrated by the lack of an aqua version for OS X. Do you plan on developing a native version for OS X 10.4? Genetics Waksman Institute Rutgers University Piscataway, NJ 08854 www.cgl.ucsf.edu /pipermail/chimera-users/2005-September/000461.html   (103 words)

SIV infection of macaques as a model for AIDS pathogenesis. Furthermore, pathologic processes can be evaluated throughout the course of experimental infection. Recently, molecular clones of SIV proviral DNA have been used to study genetic variation and specific viral determinants of pathogenesis. Considered together, these observations support the continued detailed study of SIV infection of macaques as a model for human AIDS. www.aegis.com /aidsline/1992/aug/M9280628.html   (356 words)

Chimera An organism consisting of two or more tissues of different genetic composition, produced as a result of mutation, grafting, or the mixture of cell populations from different zygotes. An organism produced by genetic engineering, in which DNA from distinct parent species is combined to produce an individual with a double chromosome complement. The drive from the Hoover Building is a blur. www.squidge.org /~mrs_fish/fiction/panthro/chimera.htm   (3137 words)

More Genetics Sites Help individuals and organizations address the bioethical challenges of our day. Center for Genetics and Society - Encourages responsible uses and effective societal governance of new human genetic and reproductive technologies. Public debate about the social, ethical, environmental implications of genetics. www.nochimera.com /more_sites.html   (103 words)

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