Humans normally have 46 chromosomes in each cell, divided into 23 pairs. Two copies of chromosome 7, one copy inherited from each parent, form one of the pairs. Chromosome 7 spans about 159 million DNA building blocks (base pairs) and represents more than 5 percent of the total DNA in cells.
Identifying genes on each chromosome is an active area of genetic research. Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. Chromosome 7 likely contains about 1,150 genes.
Genes on chromosome 7 are among the estimated 20,000 to 25,000 total genes in the human genome.
Scientists at the Texas Biomedical Research Institute and Yale University have identified a new target area in the human genome that appears to harbor genes with a major role in the onset of depression.
Scientists found a deadly parasite with some of its chromosomes in duplicate, others in triplicate, while still others are present four or even five times. Moreover, the copy number varies between individuals. Such a bizarre occurrence has never before been found in nature, in any organism. As a rule, chromosomes should come in couples. The scientists, from the Institute of Tropical Medicine (ITG) and the Wellcome Trust Sanger Institute, made the striking discovery while deciphering the genetic code of a series of Leishmania-parasites.
Two remarkable discoveries were today revealed by researchers into genome analysis of Leishmania parasites. These results uncovered a surprising level of variation at the genome structure level.
Investigators have identified a human chromosome containing a specific gene associated with susceptibility to herpes simplex labialis (HSL), the common cold sore.
Pregnant mothers in the U.S. who wish to know whether they're carrying a fetus with Down syndrome now have access to a commercial genetic blood test that has a 99 per cent accuracy rate.
Researchers from Massachusetts General Hospital, Harvard Medical School and CIC bioGUNE discover a complex cell mechanism activated by a protein —HOXB9— that becomes an obstacle for radiation effectiveness.
Geneticists at Emory University School of Medicine have demonstrated a method that enables the routine amplification of all the genes on the X chromosome. The technology allows the rapid and highly accurate sequencing and identification of novel genetic variants affecting X chromosome genes.
A new patent covering tumor suppression technologies, including the company's lead product candidate Oncoprex, was recently awarded to The University of Texas System by the Japan Patent Office. Patent number 4813746 pertains to the discovery that chromosome 3p21.3 genes act as cancer suppressors.
A new DNA-based prenatal blood test that can strikingly reduce the number of risky diagnostic procedures needed to identify a pregnancy with Down syndrome is ready to be introduced into clinical practice.
Researchers in South East Asia have identified two genetic variants associated with increased susceptibility to severe dengue. The study, funded by the Wellcome Trust and the Agency for Science, Technology, and Research, Singapore, offers clues to how the body responds to dengue infection.
In a new study a team of researchers looked at the genotypes of 27,243 people from two separate studies to see if they had a certain gene variant. Earlier studies including a 2010 meta-analysis in the Journal of the American Medical Assn. found that the 9p21 gene is associated with a higher risk of heart attack and cardiovascular disease.
As a teenager just moved to Iowa from war-ravaged Germany in 1951, John M. Opitz, M.D., wanted to study developmental biology, but his "very Prussian" mother insisted he go to medical school instead.
The Eunice Kennedy Shriver National Institute of Child Health & Human Development, part of the National Institutes of Health, has awarded researchers at Albert Einstein College of Medicine of Yeshiva University and collaborators at the Children's Hospital of Philadelphia (CHOP) a five-year, $6.7 million grant to study the genetics of both rare and common congenital heart abnormalities known as conotruncal defects.
The Genetics & IVF Institute is now offering 24 Chromosome Microarray, which is a new, comprehensive test used as part of an IVF cycle to evaluate the number of chromosomes present in an embryo before it is transferred to the mother.
Scientists at deCODE Genetics and academic collaborators from Iceland, Norway, Denmark, the Netherlands and the USA report the discovery of low frequency variants in the human genome that associate with risk of gout, a common inflammatory arthritis, and serum uric acid levels.
The genomic analysis technologies enable the study of genetic factors related to numerous diseases. In few areas this researches brought such a big and useful volume of information as in the case of melanoma.
When cells divide normally, DNA gets copied perfectly and distributed among the daughter cells with an even hand. Occasionally though, DNA breaks during division and is rearranged, resulting in duplications or deletions of important parts of the blueprint.
Researchers at Children's Hospital Boston and the Immune Disease Institute (IDI) have created a method for mapping "hot spots" in the genome where chromosomes are most likely to break and recombine, knowledge that helps define the rules that govern when and where breaks occur.
The largest-ever analysis of genetic data related to type 1 diabetes has uncovered new genes associated with the common metabolic disease, which affects 200 million people worldwide. The findings add to knowledge of gene networks involved in the origin of this complex disorder, in which patients depend on frequent insulin injections to control their blood sugar levels.
A new technique developed by researchers at the Stanford University School of Medicine allows researchers to identify the exact DNA sequences and locations bound by regulatory RNAs. This information is necessary to understand how the recently identified RNA molecules control the expression of neighboring and distant genes.
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