A team of global experts has discovered new signals of natural selection in humans.
Evolution
Mar 1, 2023
0
27
Phenotypic plasticity is essential for responding rapidly to environmental variations. However, the genetic and evolutionary mechanism underlying plasticity in the marine organism remains poorly understood.
Evolution
Feb 9, 2023
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4
Gene expression rewiring often contributes to phenotypic evolution between newly diverged species. Changes in gene expression patterns can be caused by mutations in either cis-regulatory regions (promoter) of the gene itself ...
Plants & Animals
Jan 11, 2023
0
33
The sacred lotus enjoys an astonishing diversity of floral traits, particularly petal number, color, and flower type. Previous studies have discussed the molecular mechanisms underlying a single trait for flower development ...
Plants & Animals
Dec 13, 2022
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48
Undaria pinnatifida is an economically important brown macroalga in China. There are three sexual phenotypes (female, male, and monoicous) in the haploid gametophytes of U. pinnatifida. However, the sex-determining mechanisms ...
Plants & Animals
Dec 9, 2022
0
2
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
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58
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
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90
Events of gene fusion have been reported in several organisms. However, the role of gene fusion as part of new gene origination remains unknown. Evolutionary new genes, fused from more than two parental genes, can duck out ...
Plants & Animals
Jun 27, 2022
0
7
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
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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