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| | Sex-determination system - Hutchinson encyclopedia article about Sex-determination system |
 | | Most fish have a very flexible system of sex determination, which can be affected by external factors. | | | For example, in wrasse all individuals develop into females, but the largest individual in each area or school changes sex to become the local breeding male. | | | Process by which the sex of an organism is determined. |
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http://encyclopedia.farlex.com/Sex-determination+system
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| | Encyclopedia: X |
| | Semiotics - also known as semiology - is the study of signs, both individually and grouped in sign systems, and includes the study of how meaning is transmitted and understood. | | | The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. | | | The MPAA film rating system is a system used in the United States and instituted by the Motion Picture Association of America to rate a movie based on its content. |
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http://www.nationmaster.com/encyclopedia/X
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| | Millennia still mean early days for newly identified sex chromosome |
| | In new work, Dr. Catherine Peichel and colleagues at the Fred Hutchinson Cancer Research Center, along with Dr. David Kingsley and colleagues at the Stanford University School of Medicine, have found that threespine stickleback fish have a genetic sex-determination system in which females are XX and males are XY. | | | The evolution of a genetic sex-determination system is often accompanied by the evolution of sex chromosomes. | | | Some experimental data from young sex chromosome systems in plants and insects suggest that there are common themes underlying the formation of sex chromosomes. |
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http://www.eurekalert.org/pub_releases/2004-08/cp-msm081704.php
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| | World History :: Encyclopedia Index -- Xy |
| | INDEX OF ARTICLES: Xy Articles are indexed by the first word of the title, including "A," "The," etc. | | | World History :: Encyclopedia Index -- Xy Events Encyclopedia Localities Companies Surnames Shop |
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http://www.worldhistory.com/wiki/Xy.htm
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| | XY |
| | Sorry, no screened links relevant to XY were found: | | | Amazon.com reports that it carries about 46 items relevant to XY | | | You can click on this message to see their list of those items. |
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http://www.omniknow.com/common/wiki.php?in=en&term=XY
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| | Sex determination of Cannabis - Genetic, environmental, or both? - Marijuana Growing |
| | The genetic-afficionado's approach is that it is determined at pollination, and they base their arguements on the human and mammal XX/XY chromosome-determination system. | | | All sex-determination systems are enzyme/hormone/chemically controlled, but the triggering mechanisms for the determination systems vary from purely chromosome-controlled to purely environmental. | | | Some species have their sex determined by bacterial infections, and others again practice sex-changes, where they start out as one gender and changes sex during their lifetime. |
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http://www.overgrow.com/edge/showthread/t-466228.html
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| | MCDB 2150 -- Lecture 11 |
| | XY males are hemizygous: One of the features of an X/Y sex chromosome system is that females have two copies of the X chromosome, one of which is inherited from each parent, whereas males have only one, inherited from the mother, and paired with a Y chromosome inherited from the father. | | | Patterns of inheritance: In this lecture, we will focus primarily on patterns of inheritance in the XX/XY system in mammals, including humans, and in Drosophila, with some brief references to other systems. | | | However, individuals of both sexes normally express low levels of the hormones associated primarily with the other sex, and cases can be found within the usually accepted range of normalcy where there is some degree of expression of facial hair in women or breast enlargement in men. |
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http://www.colorado.edu/MCDB/MCDB2150Fall/notes/L11.html
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| | Talk:Sex-determination system - Wikipedia, the free encyclopedia |
| | From the definition, one could conclude that a sex-determination system is a method that, when applied to a certain individual, tells you whether that individual is a male or a female. | | | In that sense, a sex-determination system for dogs would be "look if you can find testicles". | | | I have read information to the effect that the WW:WZ system for birds AND snakes, (i'm not sure about insects) is a reverse xy system in that as the articles says two of the same chromosomes are needed for male determination, instead of the XX style in human. |
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http://www.wikipedia.org/wiki/Talk:Sex-determination_system
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| | XY sex-determination system - Wikipedia, the free encyclopedia |
| | The XY sex-determination system is a well-known sex-determination system. | | | The XY sex determination system was first described independently by Dr. Nettie Stevens and Edmund Beecher Wilson in 1905. | | | In the XY sex-determination system, females have two of the same kind of sex chromosome (XX), while males have two distinct sex chromosomes (XY). |
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http://en.wikipedia.org/wiki/XY_sex-determination_system
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| | Sex determination |
| | Flies have XY system, but XO are sterile males and Y does not determine sex, needed for sperm | | | Sexual orientation may be due to neuron clusters (INAH3) in hypothalamus?? | | | Pattern of sex-specific splicing in 3 sex determining genes |
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http://www.people.memphis.edu/~clessman/lect22.htm
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| | Human Anatomy Chapter 27 -- Evolution Atlas |
| | Humans (and all mammals) possess sex chromosomes, X and Y. Females are homogametic (i.e., homozygous for X: XX) and males are heterogametic (i.e., heterozygous: XY). | | | The second function is responsible for the evolution of sex and gender. | | | Sexual individuals that reproduce in a way that produces diverse offspring is much more likely to be genetically represented in future generations than asexual individuals that reproduce genetically identical offspring by mitosis. |
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http://cwx.prenhall.com/bookbind/pubbooks/martini10/chapter27/custom2/deluxe-content.html
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| | Wolbachia in Humans? |
| | infection, hence, when they reproduce, no Wolbachia are reproduced.) Pill bugs have a WZ sex-determination system, in contrast to the more common XY system found in humans. | | | a Darwinian perspective, it makes sense for Wobachia to favor the sex that can support the | | | plants as corn and rye that the mitochondrion is responsible for skewing the sex ratio in |
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http://www.ejnerfulsang.com/Wolbachia.html
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| | Pharyngula::Maybe Y chromosomes make you stupid…? |
| | (Ok, that was a lame, obscure, one-elective-in-repro-biology geek joke--mammals have an XY-chromosome sex-determination system, while birds by contrast have a WZ-chromosome sex-determination system. | | | Seriously, though, PZ and coturnix--are the two systems totally independent, or does the recent literature on platypus sex chromosomes suffice to connect them, or is it still an open question? | | | I think the answer is that they're independent -- synteny analysis shows that the avian sex chromosomes are not homologs of the mammalian sex chromosomes, as I recall. |
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http://pharyngula.org/index/weblog/comments/maybe_y_chromosomes_make_you_stupid
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| | Encyclopedia entries starting with XY |
| | XY sex-determination system - XyMTeX - Xyphoid process - XyWrite - XY - XYZ Affair - Xylem Tube EP - XYY - Xyronomys |
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http://encycl.opentopia.com/X/XY
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| | Sex-determination system - Wikipedia, the free encyclopedia |
| | The most familiar sex-determination system is the XY sex-determination system found in human beings and most other mammals. | | | A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. | | | The WZ sex-determination system is found in birds and some insects and other organisms. |
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http://www.wikipedia.org/wiki/Gonosome
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| | mychild.ca - XY sex determination system |
| | Suggested Web Sites about XY sex determination system | | | case of sex chromosomes has been reported in Telmatogeton hirtus, where there is an XY... |
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http://www.mychild.ca/XY-sex-determination-system/reference/search
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| | PAG-XI-P662: SEX CHROMOSOME MARKERS IN PACIFIC SALMON (Oncorhynchus spp.) |
| | Pacific salmon possess an XY sex determination system where the two sex chromsomes are still largely homologous and heteromorphic structure in the vicinity of the sex-determination locus (the differential region) is difficult to identify cytogenetically. | | | In family crosses, the markers were found by PCR analysis to be tightly linked to the sex-determination locus (SEX) on the Y chromosome. | | | Despite their close linkage with SEX in the four species examined, neither of the two markers are sex-linked in sockeye salmon, rainbow trout or Atlantic salmon indicating that this linkage was established after the early radiation of the Pacific salmon. |
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http://www.intl-pag.org/pag/11/abstracts/P5o_P662_XI.html
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| | PAG-XI-P662: SEX CHROMOSOME MARKERS IN PACIFIC SALMON (Oncorhynchus spp.) |
| | Pacific salmon possess an XY sex determination system where the two sex chromsomes are still largely homologous and heteromorphic structure in the vicinity of the sex-determination locus (the differential region) is difficult to identify cytogenetically. | | | In family crosses, the markers were found by PCR analysis to be tightly linked to the sex-determination locus (SEX) on the Y chromosome. | | | Despite their close linkage with SEX in the four species examined, neither of the two markers are sex-linked in sockeye salmon, rainbow trout or Atlantic salmon indicating that this linkage was established after the early radiation of the Pacific salmon. |
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http://www.intl-pag.org/pag/11/abstracts/P5o_P662_XI.html
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| | PAG-XI-W25: COMPARATIVE MAPPING OF SEX DETERMINING GENES IN TILAPIA |
| | Sex determination has been suggested to be controlled by an XY system in O. | | | mossambicus and by a WZ (female heterogametic) system in O. | | | We will also report on sex-linkages in two other crosses which are currently being genotyped. |
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http://www.intl-pag.org/11/abstracts/W05_W25_XI.html
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| | PAG-VIII: POLYPLOIDY IN MAMMALS: THE FIRST EVIDENCE OF A TETRAPLOID RODENT |
| | This desert specialist has a totally biarmed, 102-chromosome karyotype with pericentromeric heterochromatin and a XY sex determination system. | | | Since diploid number is not exactly twice that of any closely related species living today, chromosome elimination (i.e., in the sex-chromosomes and in the pair with the secondary constriction) is presumed to have occurred during the evolution of this lineage. | | | Although polyploidy in animals is believed to disrupt the balance of X chromosome relative to gene products normally maintained by dosage compensation, disomy for the sex chromosomes in T. |
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http://www.intl-pag.org/pag/8/abstracts/pag8374.html
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| | Chromosomal Sex Determination. |
| | In chromosomal sex determination, the assortment of chromosomes during metaphase of Meosis I ensures that exactly half the male gametes contain X chromosomes, and exactly half contain Y. This system produces 50% males and 50% females. | | | In humans, XX is female vs. XY male | | | In butterflies and birds, females are the heterogametic sex (females are ZW, males are WW). |
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http://www.uic.edu/classes/bios/bios101/mating/tsld023.htm
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