Sentences with phrase «versions of a given gene»

Having the right alleles (different versions of a given gene, as when the A1 allele of the D2 dopamine receptor produces 30 percent fewer receptors than the more common A2 allele) available somewhere in the population can make one species do better than another when the climate perturbs things.

Not exact matches

Normally, to achieve such a rapid evolutionary shift, a species needs to start with an alternative version of a gene already in circulation, giving natural selection more to work with, but in deer mice the new version of Agouti spread rapidly from a standing start.

So, for example, just to say for the sake of argument, that there's a gene that influences the width of the birth canal, and lets say that some versions of the gene leave women more likely to have trouble giving birth, so that their children have loss of oxygen and that could lead to changes in the brain that lead to lower intelligence scores.

Sabeti's technique identifies versions of genes that have been created by random mutation and then retained — because they give their owners some natural advantage over individuals who do not have the mutation.

Stem cells were harvested from Nina's bone marrow and given a working version of the ADA gene, before being injected back in.

Immune cells from 4 - year - old Ashanti DeSilva are given working versions of the ADA gene to treat severe combined immunodeficiency disorder (SCID).

For gene hunters, it's relatively straightforward to determine where a version of a particular gene lies on a given chromosome.

Gene therapy treats genetic diseases by giving patients a healthy version of a defective gGene therapy treats genetic diseases by giving patients a healthy version of a defective genegene.

The founders of any given breed will have only a subset of all the versions of genes — good and bad — present in the canine species.