In a cross between a short-fur guinea pig and a long-fur guinea pig, three guinea pig babies are born. Two of the babies have short fur while one has long fur. Assuming this trait follows simple Mendelian genetics, answer the following questions:
1. Which trait is dominant?
2. What is the genotype of each parent?
3. What is the genotype of the long-fur baby?
4. What is the genotype of the short-fur babies?
