New North Carolina State University research shows progress in gathering information on an important—yet difficult to characterize—human gut bacterium called Bifidobacterium, which is used in many probiotics that help ...
Cell & Microbiology
Jul 18, 2022
0
90
A team of global experts has discovered new signals of natural selection in humans.
Evolution
Mar 1, 2023
0
27
Nearly 10,000 years ago, humans settling in the Fertile Crescent, the areas of the Middle East surrounding the Tigris and Euphrates rivers, made the first switch from hunter-gatherers to farmers. They developed close bonds ...
Evolution
Dec 5, 2022
0
222
Copy number variants (CNVs) are regions of the genome that are duplicated or deleted in some individuals, and are a common type of gene-disabling mutation. The human genome contains hundreds of thousands of CNVs, but typical ...
Cell & Microbiology
Oct 28, 2022
0
58
A new study led by Imperial College London finds that drug-resistant mold is spreading from the environment and infecting susceptible people's lungs.
Cell & Microbiology
Apr 25, 2022
0
40
Medicago ruthenica, a wild and perennial legume forage widely distributed in semi-arid grasslands, is distinguished by its outstanding tolerance to environmental stress. It is a close relative of commonly cultivated forage ...
Plants & Animals
May 14, 2021
0
11
An international team of researchers led by computer scientists at the University of California San Diego have identified 163 variable number tandem repeats (VNTRs) that actively regulate gene expression. In a paper published ...
Biotechnology
Apr 12, 2021
0
20
Keck Graduate Institute (KGI) Assistant Professor and University of California, Berkeley Visiting Scientist Dr. Kiana Aran first introduced the CRISPR-Chip technology in 2019. Now just two years later, she has expanded on ...
Biotechnology
Apr 5, 2021
0
148
Coral conservation efforts could get a boost from a newly developed genotyping "chip"—the first of its kind for corals. The chip allows researchers to genetically identify corals and the symbiotic algae that live within ...
Ecology
Aug 25, 2020
0
98
Geneticists exploring the dark heart of the human genome have discovered big chunks of Neanderthal and other ancient DNA. The results open new ways to study both how chromosomes behave during cell division and how they have ...
Evolution
Jun 18, 2019
0
938
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.
This text uses material from Wikipedia, licensed under CC BY-SA
