Sentences with phrase «thousands of alleles»

By reading thousands of alleles and estimating mutation rates, the duo can work out the separation date for each allele and calculate past population sizes.

Not exact matches

Neanderthal introgression reintroduced thousands of ancestral alleles lost in the out of Africa bottleneck.

Reviewing thousands of genome wide associate studies (GWAS) to identify genetic variants in single nucleotide polymorphisms (SNPs), investigators at Dartmouth's Norris Cotton Cancer Center found that some alleles (one of a pair of genes located on a specific chromosome) are more frequently risk - associated with disease than protective.

Because diseases can be endemic to specific regions of the world, these genes exist in thousands of versions, known as alleles.

For one thing, each chromosome contains tens of thousands of different genes (or rather, alleles of different genes), and it will still be quite a few years before you can specify each single gene.

The strongest signal of selection is at the allele responsible for lactase persistence, supporting the view that an appreciable frequency of lactase persistence in Europe only dates to the past four thousand years.