Locus: a location on a chromosome where a particular gene resides.

In R. leguminosarum, which colonises peas, genes both for recognising the right species of host plant and for fixing nitrogen reside on plasmids.

In 1910, Thomas Hunt Morgan showed that genes reside on specific chromosomes.

Such binding-site differences, when present, would be promising candidates to underlie the QTL in which the gene resides.

In humans, the genes reside on 23 pairs of chromosomes.

These can be effects on the organism in which the gene resides, the environment, or other organisms.

Their work was facilitated because scientists had already begun mapping the area on chromosome 13 where the gene resides.

The gene resides on chromosome 16 in the interval containing the locus for polycystic kidney disease (PKD1).

No vital genes reside only on the Y chromosome, since roughly half of humans (females) do not have a Y chromosome.

The genes that encode these polypeptides reside on chromosome 4q in a cluster.