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Latest Y chromosome Stories

2013-07-22 10:16:49

Painstaking new analysis of the genetic sequence of the X chromosome—long perceived as the "female" counterpart to the male-associated Y chromosome—reveals that large portions of the X have evolved to play a specialized role in sperm production. This surprising finding, reported by Whitehead Institute scientists in a paper published online this week in the journal Nature Genetics, is paired with another unexpected outcome: despite its reputation as the...

Herd Fertility May Be Improved By Understanding The Gene-rich Y Chromosomes Of Bulls
2013-07-11 15:24:22

Penn State The Y chromosomes of cattle have more genes and are more active than the Y chromosomes of other primates, according to researchers. This discovery may help biologists better understand how cattle and other mammals evolved, as well as help animal breeders and farmers better maintain and enhance fertility in the cattle industry, said Wansheng Liu, associate professor of animal genomics, Penn State. "Low fertility is a big problem for the dairy and beef industry," Liu said....

Scientists Link Genetic Contributor To Heart Disease Risk
2013-06-18 19:28:45

Lee Rannals for redOrbit.com — Your Universe Online Researchers from the University of Leicester have identified a potential genetic contributor that leads to an increased risk of heart disease in men. The team wrote in the journal Arteriosclerosis, Thrombosis, and Vascular Biology that men who carry a particular type of the Y chromosome have an increased risk. They also identified the possible genes of the Y chromosome that could be responsible for its association with coronary...

Human Y Chromosome Found To Be Much Older Than Previously Believed
2013-03-06 05:56:19

redOrbit Staff & Wire Reports - Your Universe Online Researchers have discovered a Y chromosome — the hereditary factor determining male sex — that dates back to 100,000 years before the oldest known anatomically modern human fossils. The chromosome was originally obtained from an African-American man living in South Carolina. It was originally submitted to the National Geographic Genographic Project — a research project that utilizes genetic and computational...

2012-11-13 12:24:13

A new study published online today in Nature Genetics reveals a genetic link between chronic pancreatitis and alcohol consumption. Researchers from the University of Pittsburgh School of Medicine and more than 25 other health centers across the United States found a genetic variant on chromosome X near the claudin-2 gene (CLDN2) that predicts which men who are heavy drinkers are at high risk of developing chronic pancreatitis. This finding enables doctors to identify people with early signs...

A Look At The Early Evolution Of Sex Chromosomes
2012-08-06 18:24:30

Two new studies offer insight into sex chromosome evolution by focusing on papaya, a multimillion dollar crop plant with a sexual problem (as far as growers are concerned) and a complicated past. The findings are described in two papers in the Proceedings of the National Academy of Sciences. The research reveals that the papaya sex chromosomes have undergone dramatic changes in their short evolutionary histories (they are about 7 million years old; by comparison, human sex chromosomes...

2012-05-08 10:53:13

The study, published yesterday in the journal Proceedings of the National Academy of Sciences (PNAS), looked at how genes on sex-linked chromosomes are passed down generations and linked to fertility, using the specific example of the W chromosome in female chickens. The results confirm that although these chromosomes have shrunk over millions of years, and have lost many of their original genes, those that remain are extremely important in predicting fertility and are, therefore, unlikely...

Forensic-Science-Used-To-Determine-Whos-Who-In-Pre-Columbian-Peru.
2012-04-23 04:15:11

Analysis of ancient mitochondrial DNA (mtDNA) has been used to establish migration and population patterns for American indigenous cultures during the time before Christopher Columbus sailed to the Americas. New research published in BioMed Central's open access journal BMC Genetics has used more detailed DNA analysis of individuals from Arequipa region to identify the family relationships and burial traditions of ancient Peru. The social unit (ayllu) of Native South Americans is thought...

2012-03-08 10:44:37

Authors explore the role of the SRY gene in male fight-or-flight response The pulse quickens, the heart pounds and adrenalin courses through the veins, but in stressful situations is our reaction controlled by our genes, and does it differ between the sexes? Australian scientists, writing in BioEssays, believe the SRY gene, which directs male development, may promote aggression and other traditionally male behavioral traits resulting in the fight-or-flight reaction to stress. Research...

New Study Offers Evidence Against 'Rotting Y' Chromosome Theory
2012-02-23 06:04:12

Males of the world, fear not -- researchers have determined that the chromosome which determines maleness is not shrinking after all, and concerns that the gender could be headed for extinction are apparently unfounded. The study, which was led by Jennifer Hughes and David Page of the Whitehead Institute for Biomedical Research and the MIT Department of Biology, have compared the genes of the human Y chromosome to those of chimpanzees and rhesus macaques, according to Guardian Science...


Word of the Day
toccata
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.
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