Related topics: chromosomes , x chromosome
Y chromosome
hideThe Y chromosome is the sex-determining chromosome in most mammals, including humans. In mammals, it contains the gene SRY, which triggers testis development, thus determining sex. The human Y chromosome is composed of about 60 million base pairs.
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News tagged with y chromosome
Ovaries must suppress their inner male
Dec 10, 2009 |
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For an ovary to remain an ovary, the female organ has to continuously suppress its inner capacity to become male. That's the conclusion of a study in the December 11th issue of the journal Cell revealing that t ...
New insights into Australia's unique platypus
Nov 02, 2009 |
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(PhysOrg.com) -- New insights into the biology of the platypus and echidna have been published, providing a collection of unique research data about the world's only monotremes.
Researchers discover mechanism that prevents two species from reproducing
Oct 26, 2009 |
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Cornell researchers have discovered a genetic mechanism in fruit flies that prevents two closely related species from reproducing, a finding that offers clues to how species evolve.
Sex-based prenatal brain differences found
Medicine & Health / Psychology & Psychiatry
Oct 23, 2009 |
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Prenatal sex-based biological differences extend to genetic expression in cerebral cortices. The differences in question are probably associated with later divergences in how our brains develop. This is shown by a new study ...
The first men and women from the Canary Islands were Berbers
Oct 21, 2009 |
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A team of Spanish and Portuguese researchers has carried out molecular genetic analysis of the Y chromosome (transmitted only by males) of the aboriginal population of the Canary Islands to determine their ...
Genetic conflict in fish led to evolution of new sex chromosomes
Oct 01, 2009 |
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University of Maryland biologists have genetically mapped the sex chromosomes of several species of cichlid (pronounced "sick-lid") fish from Lake Malawi, East Africa, and identified a mechanism by which new ...
New genetic research indicates Jewish priesthood has multiple lineages
Sep 24, 2009 |
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Recent research on the Cohen Y chromosome indicates the Jewish priesthood, the Cohanim, was established by several unrelated male lines rather than a single male lineage dating to ancient Hebrew times.
New Genetic Research Indicates Jewish Priesthood Has Multiple Lineages
Sep 17, 2009 |
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(PhysOrg.com) -- UA geneticist Michael Hammer and his colleagues report that their research shows a number of ancestors fueled the ancient Jewish priesthood that dates back more than three millenia.Their work is currently ...
Sex Talk Revelations of the Lonely Y Chromosome
Sep 09, 2009 |
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(PhysOrg.com) -- In the week that the University of Leicester celebrates the 25th anniversary of the discovery of DNA fingerprinting (Thursday September 10) new findings from the world-renowned University of Leicester Department ...
'Achilles' heel' in Y chromosome linked to sex disorders
Sep 03, 2009 |
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The unique mechanism behind the evolutionary survival of the human Y chromosome may also be responsible for a range of sex disorders, from failed sperm production to sex reversal to Turner Syndrome.
We are all mutants: Measurement of mutation rate in humans by direct sequencing
Aug 27, 2009 |
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An international team of 16 scientists today reports the first direct measurement of the general rate of genetic mutation at individual DNA letters in humans. The team sequenced the same piece of DNA - 10,000,000 or so letters ...
Not only the gene itself, its abnormal regulation can also trigger short stature
Aug 25, 2009 |
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A specific gene is particularly frequently involved in the development of short stature. Researchers in Heidelberg have now discovered that sequences of genetic material on the X and Y chromosome that regulate this gene are ...
Male sex chromosome losing genes by rapid evolution, study reveals
Jul 17, 2009 |
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Scientists have long suspected that the sex chromosome that only males carry is deteriorating and could disappear entirely within a few million years, but until now, no one has understood the evolutionary ...
Human sperm created from embryonic stem cells (Update)
Jul 08, 2009 |
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(PhysOrg.com) -- Human sperm have been created using embryonic stem cells for the first time in a scientific development which will lead researchers to a better understanding of the causes of infertility.
Female human embryos adjust the balance of X chromosomes before implantation
Jun 29, 2009 |
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Dutch researchers have found the first evidence that a process of inactivating the X chromosome during embryo development and implantation, which was known to occur in mice but unknown in humans, does, in fact, take place ...
