First determine the genotypes of the parents.



One is a homozygous wire haired dog. You were told in the question that wire hair is dominant so what would be the genotype for this parent?





Now, the other parent is smooth haired. Is this a recessive or dominant trait?





Would this parent be homozygous or heterozygous?





With this information, what is the genotype of the second parent?





Now that you have the genotypes of the parents, perform a punnett square to determine what the F1 offspring would be (remember to place the gametes of one parent across the top and the gametes of the other parent down the left side. It does not matter which parent's gametes are placed across the top and which are placed down the side.):





Your punnett square should look similar to the one below. If it does not, review the material on gamete formation and how to set up the punnett square and try again.

S S
s Ss Ss
s Ss Ss





Now return to the question page and select the correct answers.






OK, we know that the genotypes of all the F1 generation are Ss. What gametes will be produced by each of these individuals?





Now perform a punnett square using the gametes for two of the F1 individuals:





Your punnett square should look similar to the one below. If it does not, review the material on gamete formation and how to set up the punnett square and try again.

S s
S SS Ss
s Ss ss




Three different genotypes have been produced. Which ones result in wire-haired offspring?





How many of the four possible offspring in the punnett square will be wire-haired?





Which of the genotypes will produce smooth-haired offspring?





How many of the four possible offspring in the punnett square will be smooth-haired?






Now return to the question page and select the correct answers.