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Curly hair. W is dominant to w, but the dominance of W > w is incomplete. W/W dogs have coarse hair, prominent furnishings and greatly-reduced shedding. W/w dogs have the harsh wire texture, but decreased furnishings, and overall coat length and shedding similar to non-wire animals. [63]
The Agouti gene, with its dominant A allele and recessive a allele, controls the coding for agouti signaling protein (ASIP; ). The wild-type dominant A causes the banding and thus an overall lightening effect on the hair, while the recessive non-agouti or "hypermelanistic" allele a does not initiate this shift in the pigmentation pathway.
Red hair, also known as ginger hair, is a human hair color found in 2–6% of people of Northern or Northwestern European ancestry and lesser frequency in other populations. It is most common in individuals homozygous for a recessive allele on chromosome 16 that produces an altered version of the MC1R protein. [ 1 ]
A female polydactl cat with opposable thumbs. Sh. Split Foot gene (Syndactyly). A dominant gene that reduces the number of toes resulting in a "lobster-claw" appearance. This is considered an undesirable mutation. Polydactyly. There are probably many genes, both dominant and recessive, that cause polydactyly in cats.
A rex rabbit. The rex mutation is a genetic variation in mammals that results in soft curly fur. These effects are due to changes in the structure of groups of hairs and cross-section of individual hairs. The rexed coats are unusual but occur (and have been preserved) in cats, rats, rabbits, horses, and dogs.
These genes assort independently, so a single genetic cross involving two black Labradors each with a recessive allele at both the B and the E locus (BbEe) has the potential of producing all of the possible colour combinations, while crosses involving chocolate dogs can never produce black (there being no dominant B allele in either parent) but ...
Co-dominant expression of genes for plumage colours. In cases of co-dominance, the genetic traits of both different alleles of the same gene-locus are clearly expressed in the phenotype. For example, in certain varieties of chicken, the allele for black feathers is co-dominant with the allele for white feathers.
Familial woolly hair is autosomal recessive. [2] It may be part of a syndrome such as Naxos syndrome, due to passing on of mutations in the JUP gene. [4] When part of Carvajal syndrome, it is due the passing of mutations of the Desmoplakin gene. [4] The two syndromes caused by two different genes, are considered as one entity; Naxos–Carvajal ...