Dachshunds have three basic coat types: wire-, smooth- or long-haired. These are affected by two genes, W and K. The presence of W always results in wire hair. When long-haired dogs are crossed among themselves, they always produce long-haired puppies. When dogs heterozygous for both genes are crossed, they produce offspring in the ratio 12 wire-haired: 3 smooth-haired:1 long-haired. A male wire-haired dog was crossed with several long-haired females and the phenotypic ratio of the puppies was approximately 2 wire-haired: 1 smooth-haired: 1 long-haired.
Identify the genotype of the male wire-haired dog.
WwKk
Using a Punnett square, determine how a smooth-haired puppy could be produced in the offspring.
WK Wk wK and wk for male gamete genotypes and wk for female; wwKk shown in Punnett square and identified as smooth;
