Updated: 30.03.26
Fuzz
Chromosome: 1
Genotype: frcr/frh, frcr/frcr, and frh/frh
Alternative phenotype: Fuzzy, Frizzy
Source
Fuzz info:
Charles River Hairless was once designated "hr" and Fuzzy designated "fz" but research have showing these two genes to be allelic meaning they exist on the same locus. The frcr/frcr phenotype will be the most naked, while the frh/frh phenotype will have some fuzz, especially around the genitals/tail, face and feet. The frh/frcr phenotype appears an intermediate between that of the other two.
Quote: "For the sake of clarity, we suggest that both the CR hairless and the rat fz mutations be renamed frizzy-Charles River (fr^cr) and frizzy-Harlan (fr^h), respectively..."
Genotype: frcr/frh, frcr/frcr, and frh/frh
Alternative phenotype: Fuzzy, Frizzy
Source
- The Charles River ‘‘Hairless’’ Rat Mutation Maps to Chromosome 1: Allelic With Fuzzy and a Likely Orthologue of Mouse Frizzy
- Fuzzy, a hypotrichotic mutant in linkage group I of the Norway rat
Fuzz info:
Charles River Hairless was once designated "hr" and Fuzzy designated "fz" but research have showing these two genes to be allelic meaning they exist on the same locus. The frcr/frcr phenotype will be the most naked, while the frh/frh phenotype will have some fuzz, especially around the genitals/tail, face and feet. The frh/frcr phenotype appears an intermediate between that of the other two.
Quote: "For the sake of clarity, we suggest that both the CR hairless and the rat fz mutations be renamed frizzy-Charles River (fr^cr) and frizzy-Harlan (fr^h), respectively..."
Fuzzy, frcr/frh, frcr/frcr, and frh/frh
Either:
Either:
- One copy of Frizzy-Charles River and once copy of Frizzy-Harlan or
- two copies of Frizzy-Charles River or
- two copies of Frizzy-Harlan
