You are studying a plieotrophic gene in dogs. One trait governed by this gene is tail length. For this trait the T allele is associated with normal length tails and the t allele is associated with short tails. The other trait governed by T/t is viability. In this case, T is associated with normal growth and development; whereas t is associated with embryonic loss of viability. In both cases T is completely dominant to t. You cross two dogs that are Tt heterozygotes. What ratio of offspring do you expect to see as a result of this cross?

a. 3 dogs with short tails : 1 dog with normal tail
b. 2 dogs with normal tails : 1 dog with short tail
c. 3 dogs with normal tails : 1 dog with short tail
d. 2 dogs with short tails : 1 dog with normal tail
e. None of the above