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| | Whither the Y? |
 | | Once a particular chromosome (the Y for example) was associated with one sex, however, things would have started to change. | | | As he pointed out, the same principle should apply to any chromosome which cannot undergo recombination. | | | Bill Rice, however, decided that there was indeed a way to make such a test. |
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http://biomed.brown.edu/Faculty/M/Miller/Discover/Y.html
(2498 words)
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| | Science Spectra [Article] |
| | Not only does a new UEP arise on a particular Y chromosome at a particular time and in a particular person, it begins its history in the company of certain pre-existing microsatellite alleles. | | | Marina Faerman and her colleagues at the Hadassah Medical School in Jerusalem adopted this approach to identify the sex of infant skeletons too young and incomplete to be classified in any other way. | | | But small changes (called polymorphisms) do occur, and this article describes how the correct interpretation of these changes in the Y chromosome, when passed down from generation to generation, can illuminate our understanding of human history. |
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http://www.ucl.ac.uk/tcga/ScienceSpectra-pages/SciSpect-14-98.html
(3507 words)
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| | Y chromosome - Wikipedia, the free encyclopedia |
| | Researchers are not yet certain why an extra copy of the Y chromosome is associated with tall stature and learning problems in some boys and men. | | | Errors not caught by this technique are weeded out over time through natural selection. | | | Such conditions often affect sex determination (whether a person has the sexual characteristics of a male or a female), sexual development, and the ability to have children (fertility). |
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http://en.wikipedia.org/wiki/Y_chromosome
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| | Discover: Y? - Y chromosome research |
| | In fact, during this stage in our evolution, before mammals branched off from our reptilian ancestors, gender was probably determined by conditions in the environment (it still is in animals such as crocodiles and turtles, which have no sex-determining chromosomes). | | | When page came along in the early 1980s, "a wandering Harvard medical student looking for a little research on the side," he found himself recruited into early efforts to map the human genome. | | | Most researchers think that, like an appendix or little toe, it's well on its way to becoming extinct--eventually humans will just have to determine gender some other way. |
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http://www.findarticles.com/p/articles/mi_m1511/is_n11_v18/ai_19847181
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| | Taipei Times - archives |
| | Lots of species may have tried variations on this theme to avoid extinction, but it seemed that none succeeded until, in 1995, researchers found a mammal that had managed to escape this fate. | | | This is an astonishingly high figure, and there is no reason to think things will improve in the future -- quite the reverse in fact. | | | But one thing distinguishes Homo sapiens -- we are at least capable of being aware of our impending demise. |
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http://www.taipeitimes.com/News/edit/archives/2003/09/06/2003066731
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| | USS Clueless -- Noah's Y chromosome |
| | Humans have 23 pairs of chromosomes and one of each comes from our mothers and one from our fathers. | | | However, such a person will also be sterile, because no ovaries form. | | | The point is this: if a person is fertile and has a Y chromosome, then that person will be male. |
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http://denbeste.nu/essays/noah.shtml
(1106 words)
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| | The Y Chromosome, Genetics and Genealogy |
| | Many times in the process of searching through our family histories, we reach points where assumptions have been made regarding the family lineage. | | | Y chromosome studies have been performed on populations from around the world to evaluate the relationships between ethnic groups and closely related families. | | | Y chromosome testing is not paternity testing, as it relies only on the analysis of the male DNA. |
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http://genealogy.about.com/library/authors/ucwilliams1a.htm
(991 words)
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| | Human Y Chromosome Sequenced |
| | The results of the sequencing don’t tell us much new about why males are the way they are. | | | sequence of a human sex chromome — the tiny Y | | | This makes it exceedingly difficult to determine the full sequence, researchers said. |
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http://members.aol.com/jekluc/030618ychrom.html
(572 words)
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| | Amazon.com: Books: Y : The Descent of Men |
| | There is much interesting information, but the lack of structure -- a long series of facts stated one after another with very little to link them together -- makes it difficult to read more than a few pages at a time. | | | More seriously, the whole book encourages a confusion between maleness and possession of a Y chromosome, even though the author is perfectly well aware (and explains in the first chapter) that the system for sex determination used by most mammals is only one of several that exist in nature. | | | Even within their embryonic development, much can go awry. |
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http://www.amazon.com/exec/obidos/tg/detail/-/0618139303?v=glance
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| | Y-Chromosome Links |
| | These comparisons have shed light on the origins of modern humans, our relationships with other primates, how populations spread across the globe and mixed with each other, and how individuals are related to each other. | | | Below are links to news reports and scientific articles relating to the Y chromosome in the study of human populations and lineages. | | | Y Chromosome Study Suggests Asians, Too, Came from Africa (Scientific American) |
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http://john.hynes.net/y.html
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| | USATODAY.com - Study makes sense of Y chromosome |
| | "Our goal is to bring respectability to the male chromosome," Page said. | | | Y's bad image is based on assumptions about chromosome pairing. | | | Chromosomes are damaged over time, but the pairs are able to swap damaged parts for healthy ones, restoring chromosomes at conception. |
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http://www.usatoday.com/news/health/2003-06-18-Y-Chromosome-repair_x.htm
(398 words)
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| | Pharyngula::Evolution of the X chromosome |
| | Excellent review of the article -- I now feel like I don't need to read the original myself (just kidding). | | | This kind of research is impossible to do and impossible to interpret except in terms of evolution. | | | The gradual erosion of the Y shows us what the fate of our other chromosomes would be, if there weren't recombination and selection working to keep them up. |
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http://pharyngula.org/index/weblog/comments/evolution_of_the_x_chromosome
(3646 words)
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| | Medical Dictionary definitions of popular medical terms |
| | Learn more about our Medical Dictionary and the book | | | MedicineNet Home > MedTerms medical dictionary A-Z List > Y | | | Please consult your healthcare provider before beginning any course of supplementation or treatment. |
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http://www.medterms.com/script/main/alphaidx.asp?p=y_dict
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| | Boston.com / News / Boston Globe / Health / Science / In pursuit of the Y chromosome |
| | The publication of the geneticist's research into the chromosome that establishes maleness firmly established his reputation in the scientific community. | | | As the Whitehead Institute's first fellow when the program was founded in 1984, Page devoted his scientific life to the chromosome that most scientists thought was a genetic junkyard that did nothing but determine a person's sex. | | | He said that he discovered his life's work with the Y chromosome by chance, aided by a dose of natural curiosity. |
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http://www.boston.com/news/globe/health_science/articles/2004/12/14/in_pursuit_of_the_y_chromosome
(448 words)
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| | Y Chromosome |
| | Chromosomes generally come in matched pairs, with one member of each pair from Mom and the other from Dad. | | | The idea that men had their own chromosome was recognized in the early 1920s, and the Y was one of the first to be identifiable under a microscope. | | | The work should help researchers learn about causes of male infertility, because it'll help them identify genes on the Y that men need to make sperm. |
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http://www.manbir-online.com/tidbits/y-chromo.htm
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| | News in Science - Male Y chromosome here to stay - 20/06/2003 |
| | The human male sex chromosome does have the ability to repair itself and may not be headed for extinction as had previously been thought, according to a surprising new study. | | | But this deletion process may not have had entirely positive consequences because a proportion of cases of male infertility have been found to be the result of deletions of key genes in the Y chromosome. | | | The team believes the Y has developed an apparently unique way of pairing up with itself. |
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http://www.abc.net.au/science/news/stories/s884493.htm
(588 words)
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| | Y chromosome - definition of Y chromosome in Encyclopedia |
| | It is found in human beings and other mammals. | | | SRY is not the only male-determining gene in mammals, or even the most common: most non-primate mammals use a different Y-chromosome gene, UBE1, for this purpose. | | | 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://encyclopedia.laborlawtalk.com/Y_chromosome
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| | CarlZimmer.com |
| | The only way a difference between the mitochondrial genes of a mother and her child can arise is if they mutate. | | | But natural selection of a gene is not the only force capable of making it more widespread-culture might have been responsible. | | | It was then relatively easy for them to study Y chromosomes from various parts of the world to see if they shared any particular mutation. |
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http://www.carlzimmer.com/articles/2001/articles_2001_AdamEve.html
(2229 words)
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| | Y chromosome |
| | a sex chromosome of humans and most mammals that is present only in males and is paired with an Xchromosome. |
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http://www.infoplease.com/ipd/A0743604.html
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| | The Y chromosome as a marker for the history and structure of human populations |
| | Particular sub-sets of Y chromosomes may predispose to infertility, or to male-specific cancers, and thus it may be possible to identify the influence of selection on Y haplotypes (19 - 21), as we have done for one class of XX male (22). | | | The human Y chromosome determines maleness by causing the development of the testis. | | | Other such loci may exist on the Y, and these are being sought. |
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http://www.le.ac.uk/genetics/maj4/project.html
(1397 words)
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| | Sex Chromosomes |
| | The choice is usually determined by the temperature at which early embryonic development takes place. | | | This diagram shows the structure of the human Y chromosome. | | | An organism whose cells vary in effective gene content and hence in the expression of a trait, is called a genetic mosaic. |
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http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/SexChromosomes.html
(1638 words)
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| | CRAIN/CRANE DNA Y Chromosome Surname Study |
| | The area may or may not be very specific. | | | Additionally it may be possible to learn which Haplogroup or Haplotype your markers place you in and what part of the world your paternal Y ancestor originated. | | | The value of a project such as this increases expotentially with each new participant. |
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http://www.genpage.com/CrainDNA.html
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| | BBC NEWS Science/Nature Masculinity guardian revealed |
| | The Y chromosome work is reported in the journal Nature. | | | The scientists found 78 genes in total on the Y, many but by no means all of them to do with sperm production. | | | This DNA bundle - one of 24 distinct chromosomes found in human cells - holds the crucial information to make the male of our species. |
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http://news.bbc.co.uk/2/hi/science/nature/3000742.stm
(658 words)
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| | NOVA Online Lost Tribes of Israel Tracing the Cohanim |
| | Remarkably, the evidence suggests the Cohanim chromosomes coalesce at a date that corresponds with when the priesthood is thought to have begun. | | | If this hereditary tradition has been closely followed, the Y chromosomes of the Cohanim today should bear some resemblance to one another because of their unbroken link back to a common ancestor, Aaron. | | | By looking at the differences between Y chromosomes in the Cohanim, researchers can estimate roughly how many generations ago members of the priesthood had a common ancestor. |
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http://www.pbs.org/wgbh/nova/israel/familycohanim.html
(339 words)
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| | Wired News: Y Chromosome May Not Be Doomed |
| | The Y chromosome has already disappeared in some other animals and "there's no reason to expect it can't happen to humans," she said. | | | Researchers found no sign of gene loss over the past 6 million years, suggesting the chromosome is "doing a pretty good job of maintaining itself," said researcher Dr. | | | If it happened in people, some other chromosome would probably take over the sex-determining role of the Y, she said. |
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http://www.wired.com/news/print/0,1294,68707,00.html
(568 words)
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| | Gender Politics |
| | The Y chromosomes of the world are remarkably similar, with only about one hundredth as much variation as on the other chromosomes. | | | Oddly enough, African Y chromosomes are particularly invariable [despite most human diversity as a whole arising from our ancient origins there]. | | | This lack of divergence among male lineages suggests that their common ancestor lived so recently that there has not been time for his descendants' Y chromosomes to accumulate differences. |
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http://www.dhushara.com/book/nagual/womenW.htm
(3414 words)
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| | Human Chromosome Y |
| | Recurrent Chromosome Aberrations in Cancer -- Cancer Gene Anatomy Project | | | GeneLoc -- an integrated map for each human chromosome | | | OMIM Chromosome Gene Map -- location of disease and other expressed genes |
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http://www.ornl.gov/sci/techresources/Human_Genome/launchpad/chromY.shtml
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| | Wired News: Male Chromosome Seriously Weird |
| | As a whole, the chromosomes contain all the 30,000 or so genes it takes to make a human. | | | There are 24 chromosomes that make up the human genome. | | | Until now, some researchers had disdained the Y chromosome. |
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http://www.wired.com/news/medtech/0,1286,59295,00.html
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| | BBC NEWS Science/Nature The genetic handbook of the male |
| | It is no surprise that most of these genes are the instructions the body needs to produce sperm. | | | What is probable is that they hold hidden treasure for those seeking to diagnose and treat male infertility. | | | Decoding the Y has proved to be an onerous task. |
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http://news.bbc.co.uk/2/hi/science/nature/2994226.stm
(854 words)
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| | NPR : As Y Chromosome Shrinks, End of Men Pondered |
| | That means that many of the genes on the Y chromosome do occur as pairs. | | | The 22 other chromosomes in human cells are matched pairs, shared by men and women. | | | All Things Considered, December 13, 2004 · It takes a man to carry a Y chromosome, and it takes the Y chromosome to make sperm, which is necessary for human reproduction. |
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http://www.npr.org/templates/story/story.php?storyId=4225769
(653 words)
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| | Proving History Through Science -- Phoenician’s Reborn through the DNA "Alphabet," the Y Chromosome |
| | The way through which the objectives will be achieved is through tracing part of the Y chromosome that does not mutate. | | | Summary of The National Geographic study (NGM), October 2004 issue: and the HLA study tracing ancient origins of the Lebanese to the older Mediterranean substratum | | | Paste the URL/Address in the link that comes up and follow the instructions for the related site. |
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http://www.phoenicia.org/genetics.html
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| | NPR : Scientists Decipher Y Chromosome |
| | There's no gene to explain why men insist on changing the TV channel all the time, but other secrets of the Y chromosome are revealed in two new studies. | | | Scientists say deciphering the genetic code of the Y chromosome is a small but important step in understanding the deep biological differences between men and women. | | | See all 23 pairs of human chromosomes under the microscope. |
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http://www.npr.org/templates/story/story.php?storyId=1303260
(309 words)
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| | [No title] |
| | In 22 of the 23 pairs, the 2 chromosomes are very similar (homologous). | | | Women have a second X chromosome whilst in men, the second chromosome is considerably smaller and is known as a Y chromosome.Because a male 23rd pair are disimilar (X and Y), genetic material cannot readily exchange between them, (the same does not hold for the X and X female combination as their similarity permits exchange). | | | Therefore the Y chromosome of every living man directly resembles that of his father, grandfather, great grandfather etc. and cousins of any degree who also have the same male ancestor. |
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http://www.savin.org/dna/y-chromosome-project.html
(566 words)
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| | Roper Families Y-Chromosome Project |
| | There are several labs that do such work, at a cost of about $100 per person. | | | The only change from one generation to the next is by mutations, which are rare. | | | Elementary genetics teaches that a human egg becomes a female embryo when a sperm gives it an X chromosome (mostly DNA) and a male embryo when the sperm gives it a Y chromosome (mostly DNA). |
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http://www.roperld.com/RoperGenetics.htm
(4647 words)
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| | Chromosome Y: Human Genome Landmarks Poster |
| | These regions reflect the unique patterns of light and dark bands seen on human chromosomes that have been stained to allow viewing through a light microscope. | | | Chromosomal regions that vary in staining intensity and are sometimes called heterochromatin (meaning "different color"). | | | The U.S. Department of Energy Biological and Environmental Research program funds this site. |
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http://www.ornl.gov/hgmis/posters/chromosome/chromoY.html
(348 words)
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| | The Y Chromosome Consortium |
| | The Y Chromosome Consortium (YCC) is a group involved in a collaborative effort to study genetic variation on the human Y chromosome. | | | The YCC Web is a forum for communicating information relating to the NRY. |
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http://ycc.biosci.arizona.edu
(67 words)
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| | Chris Pomery's DNA Portal: DNA & the Family Historian |
| | The June 2000 issue of the National Genealogical Society Quarterly (Vol 88 #2) had an excellent article by Thomas Roderick called The Y Chromosome in Genealogical Research: From Their Ys a Father Knows His Own Son. | | | The US News & World Report has a well-written feature article that provides an overview for the general reader with lots of links. |
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http://freepages.genealogy.rootsweb.com/~allpoms/genetics.html
(2014 words)
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| | Y chromosome - definition of Y chromosome in General |
| | Y chromosome - the sex chromosome that is carried by men; "human males normally have one X chromosome and one Y chromosome" | | | Embed a dictionary search in your own web page | | | Y chromosome - definition of Y chromosome in General |
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http://dictionary.laborlawtalk.com/Y_chromosome
(41 words)
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| | Y-Chromosome STRs |
| | YHRD-Y Chromosome Haplotype Reference Database (34,558 haplotypes with 9 loci): http://www.yhrd.org/index.html | | | AAFS 2002 Y Chromosome Workshop presentation (February 12, 2002; Atlanta, GA) | | | AAFS 2004 Y Chromosome Workshop (February 17, 2004; Dallas, TX) |
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http://www.cstl.nist.gov/biotech/strbase/y_strs.htm
(304 words)
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| | Y Chromosome DNA Data on Jefferson and Hemings |
| | This document maintained by Robert J. Huskey Last updated on February 25, 2003. | | | Y Chromosome DNA Data on Jefferson and Hemings |
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http://www.people.virginia.edu/~rjh9u/jeffhemm.html
(476 words)
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| | Y-Chromosome Nomenclature System |
| | For a list of updates to this article, please visit the Progress Report section | | | Running Head: Y chromosome haplogroup tree and nomenclature |
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http://ycc.biosci.arizona.edu/nomenclature_system/frontpage.html
(86 words)
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| | Surname DNA Projects |
| | Brigham Young University DNA Project [current project will yield a huge database of results--whether anyone gets access to it, and how, remains to be seen] | | | Y Chromosome Consortium (YCC) paper on the New Haplogroup Nomenclature |
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http://www.duerinck.com/surname.html
(140 words)
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