Manx cats are heterozygous for a dominant mutation that results in no tails (or very short tails), large hind legs, and a distinctive gait. The mating of two Manx cats yields two Manx kittens for each normal, long-tailed kitten,
rather than three-to-one as would be predicted from Mendelian
genetics. Therefore, the mutation causing the Manx cat phenotype is
likely a(n) __________ allele.
Courtesy of PETNET in Australia