Editing Rhodesian Ridgeback (section)

==Genetics of the ridge==
[[File:Male Rhodesian ridgeback IMG 6800.JPG|thumb|Male Rhodesian Ridgeback]]
The [[genotype]] responsible for the ridge was found by a consortium of researchers at the [[Swedish University of Agricultural Sciences]] (Nicolette Salmon Hillbertz, Göran Andersson, et al.), Uppsala University (Leif Andersson, Mats Nilsson, et al.) and the Broad Institute ([[Kerstin Lindblad-Toh]], et al.) in 2007.<ref>{{cite journal | last1 = Salmon Hillbertz | first1 = NH | last2 = Isaksson | first2 = M | last3 = Karlsson | first3 = EK | last4 = Hellmén | first4 = E | last5 = Pielberg | first5 = GR | last6 = Savolainen | first6 = P | last7 = Wade | first7 = CM | last8 = von Euler | first8 = H | last9 = Gustafson | first9 = U | last10 = Hedhammar | first10 = A | last11 = Nilsson | first11 = M | last12 = Lindblad-Toh | first12 = K | last13 = Andersson | first13 = L | last14 = Andersson | first14 = G | date = Nov 2007 | title = Duplication of FGF3, FGF4, FGF19 and ORAOV1 causes hair ridge and predisposition to dermoid sinus in Ridgeback dogs | journal = Nat Genet | volume = 39 | issue = 11| pages = 1318–20 | pmid = 17906623 | doi=10.1038/ng.2007.4| s2cid = 22988683 }}</ref>

The only disqualification in the AKC standard for this breed is "ridgelessness". This term refers to the purebred offspring of [[heterozygous]] parental animals that do not inherit a copy of the ridge mutation from either parent and thus lack the classic ridged back. The most current research suggests that the ridge mutation is [[autosomal dominant]] with near-complete [[penetrance]]: 95% of heterozygous dogs have a ridged back. Well under 25% of puppies lack a ridge, indicating a significant proportion of the breed are [[homozygous]] for the mutation{{Citation needed|date=July 2018}}.

The genetic test which distinguishes dominant homozygotes (R/R - two ridge genes) from heterozygotes (R/r - one ridge gene) is available ([http://www.genocan.eu www.genocan.eu/en]). Using the genetic test, a breeder may accurately predict birth of ridgeless puppies.

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File:Ridgeback063.JPG
File:Rhodesian ridgeback głowa rzut z przodu.jpg
File:Akani Kopf.jpeg
File:Big rhodesian male IMG 6830.JPG
</gallery>

[[File:Ridgeback on trail.jpg|thumb|right|Rhodesian Ridgeback on trail]]
[[File:Ridgeback.jpg|thumb|right|Rhodesian Ridgeback running]]
[[File:Rhodesian ridgeback head study.jpg|thumb|Rhodesian Ridgeback]]