A dominant gene produces this small bump.

A dominant gene that reduces the number of toes resulting in a lobster-claw appearance.

This a naturally occurring, cat body-type mutation of the spine, caused by a dominant gene.

This mutation may be a dominant gene, in that even one copy of the mutated allele will produce gaitedness.

In addition to being an incomplete dominant gene, the hairless gene has a prenatal lethal effect when homozygous.