chromosome 2 7

Tag: "chromosome" at biology news

Scientists identify a candidate gene for osteoporosis

...s genetic studies had pointed to a region on mouse chromosome 1 as containing a gene responsible for BMD regulat...ohan and his colleagues honed in on this region of chromosome 1 using a variety of molecular techniques, and they located a gene called DARC (Duffy Antigen Rece...

Genes and genius: Researchers confirm association between gene and intelligence

... zeroed in on CHRM2, the neuronal receptor gene on chromosome 7. The CHRM2 gene activates a multitude of signaling pathways in the brain involved in learning, memory and other higher brain functions. The research team doesn't yet understand how the gene exerts its effects on intelligence. Intelligence was on...

Drug treatment improves learning in mice with Down syndrome symptoms, Stanford/Packard study shows

...Down syndrome, which is caused by an extra copy of chromosome 21. It is the leading cause of mental retardation in the country, and it is also associated with childhood heart disease, leukemia and early onset Alzheimer’s disease. The researchers used a mouse model of Down syndrome for their study in which about...

Fruit fly gene research may shed light on human disease processes

...ns. "However, in the fly, unlike in humans, the Y chromosome does not influence sex. Instead, two X chromosomes signal the fly to be female, and one X chromosome means it will be male." A chromosome is a single DNA molecule that may contain different units of...

New protein implicated in autism

... development of autism. Although a region of human chromosome 7 has been identified to be associated with suscep... gene in the autism susceptibility region of human chromosome 7, had impaired social interactions (when pairs of CADPS2-deficient mice that had never met were pla...

Making mice with enhanced color vision

...ican) primates such as humans, the two different X chromosome genes duplicated so that each X chromosome now carries the genes for both receptor types, giving both males and females trichromatic color visi...

Tiny clue reveals new path toward heart disease

... such a region: a small section of the long arm of chromosome 3 where just a handful of genes were located. Chro... the researchers scanned the same small section of chromosome 3 for SNPs that differed in sequence between individuals with and without coronary heart disease. ...

Bird sex is something else

...es and females get different-sized portions of sex chromosome genes with a balancing act geneticists call dosage...pes of finch and embryonic chicken brain tissue, Z chromosome genes were expressed up to 40% higher in ZZ males than ZW females. This contrasts with findings from...

Scientists identify a gene that may suppress colorectal cancer

...in the cell. “In humans, ATP5A1 is located on chromosome 18, in a region that often exhibits genetic altera... is a modifier gene, and it is located on the same chromosome as Apc in mice. Interestingly, the results suggest that the mutant Atp5a1 gene caused the death...

Severe mental retardation gene mutation identified

...e systematically looking at all the genes on the X chromosome irrespective of what they do." X-linked mental ...n. The investigators systematically analyzed the X chromosome for gene mutations. Dr. Raymond says that the families are receiving information from the study...

Largest genomic search finds genes that may contribute to autism

...ne and a previously unidentified region of another chromosome as the location of another gene that may contribut...er glutamate, and a still-to-be-pinpointed gene on chromosome 11 to be likely susceptibility genes for autism. "Neurexin 1 is a highly likely candidate," said ...

Susceptibility to Crohn's disease -- an important new clue

...to Crohn’s disease and identified the key locus on chromosome 5. Individual susceptibility to many common diseases, including Crohn’s disease, is determined by a combination of environmental and genetic factors and identifying these genetic risk factors is one of the most important objectives of modern medic...

Scientists perform 'tricky' operation

...o localise specific genes of interest to the whole chromosome and begin the mapping process. "Mapping the genome is the next step in the genome sequencing of T. vaginalis and will create a visual blueprint of the parasite, allowing researchers to see where their genes fit in to the big picture." The resu...

DNA ends: Common tool, different job

...meres to compensate for the continual attrition at chromosome ends. At the same time, telomerase activity is the...s has been a long-standing puzzle, because mending chromosome ends as though they were double-strand breaks would result in either unregulated degradation or end-...

Autism gene identified by researchers at Yale working with a global research consortium

... 19 countries to identify a gene and a region of a chromosome that may lead to autism in children. The findings...iously linked to autism. They also found a gene on chromosome 11 that may be linked to autism susceptibility. That gene has not yet been pinpointed. Researche...

Researchers find gene mutation that causes infertility in male mice

...g conception and create an embryonic cell with two chromosome sets, one from each parent. The mutation leads t...lities during meiosis, which can potentially cause chromosome imbalances and birth defects, the researchers discovered. In addition, the researchers found that fe...

Pitt study notes decline in male births in the US and Japan

...ollutants may impact the SRY gene ?a gene on the Y chromosome that determines the sex of a fertilized egg. Other environmental factors that also may affect the viability of a male fetus include the parents?weight, nutrition and the use of alcohol and drugs. In the study, Dr. Davis and her colleagues repor...

Gene found for rare disorder may reveal new pathway in mental retardation

...le in many species in controlling the integrity of chromosome pairs during cell division. Recent research has unexpectedly showed that mutated genes along the cohesin pathway also cause specific abnormalities during human development. "In these cohesin complex proteins, the strongest effect seems to be in br...

Stanford-led study closes in on genes that may predispose some people to severe depression

...region rife with promise has been located on one chromosome by a consortium of researchers working under Doug...the most suspicious of these regions, located on chromosome 15. Levinson said the team studied six DNA markers in this region in the first study, and an addit...

Researchers attach genes to minichromosomes in maize

... transmission of hereditary information. Whereas a chromosome is made of both centromeres and telomeres with muc...omes and cannot stack multiple genes on a separate chromosome independent of the others. By stacking genes on minichromosomes, scientists could create crops th...

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