In one of the largest ever gene-environment interaction studies of red meat and colorectal cancer, which explored the impact of red meat consumption on a person's cancer risk based on their genotype, researchers have identified ...
Mar 15, 2024
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The first ever genetic analysis of people with extremely high intelligence has revealed small but important genetic differences between some of the brightest people in the United States and the general population.
Aug 5, 2015
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New research supported by the National Institutes of Health delineates how two relatively common variations in a gene called KIF3A are responsible for an impaired skin barrier that allows increased water loss from the skin, ...
Aug 14, 2020
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In The BMJ's Christmas edition this week, a study identifies the genetic origin of the ability to smell the strong, characteristic odor in human urine produced after eating asparagus.
Dec 13, 2016
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DNA variation in a gene called ROBO1 is associated with early anatomical differences in a brain region that plays a key role in quantity representation, potentially explaining how genetic variability might shape mathematical ...
Oct 22, 2020
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The risk of aortic stenosis doubles when a first degree relative had the disease, according to research presented at ESC Congress 2013 today by Dr. Mattis F. Ranthe from Denmark. The study of 4.2 million people from Danish ...
Sep 1, 2013
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A large DNA analysis of people with and without pancreatic cancer has identified several new genetic markers that signal increased risk of developing the highly lethal disease, report scientists from Dana-Farber Cancer Institute.
Aug 3, 2014
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Scientists have discovered another 15 genetic 'hot-spots' that can increase a woman's risk of developing breast cancer, according to research published today in Nature Genetics.
Mar 9, 2015
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Approximately 0.1%: that is the average genetic difference between two individuals. This small percentage is responsible for the variations of certain physical traits, such as eyes, hair, and height, but also for differences ...
Aug 24, 2018
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(Medical Xpress)—The number and quality of social relationships is now considered to be a particularly strong marker for health, well-being, longevity and sexual reproductive fitness. However, most research into the neurobiology ...
A single-nucleotide polymorphism (SNP, pronounced snip) is a DNA sequence variation occurring when a single nucleotide — A, T, C, or G — in the genome (or other shared sequence) differs between members of a species (or between paired chromosomes in an individual). For example, two sequenced DNA fragments from different individuals, AAGCCTA to AAGCTTA, contain a difference in a single nucleotide. In this case we say that there are two alleles : C and T. Almost all common SNPs have only two alleles.
Within a population, SNPs can be assigned a minor allele frequency — the lowest allele frequency at a locus that is observed in a particular population. This is simply the lesser of the two allele frequencies for single-nucleotide polymorphisms[1]. There are variations between human populations, so a SNP allele that is common in one geographical or ethnic group may be much rarer in another.
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