North American wolves can have gray fur or black fur. A single gene with two alleles codes for fur color. Information about the fur color of parents and offspring in four wolf families is shown below. Family
1 | gray fur x black fur | 3 gray fur : 2 black fur
2 | gray fur x black fur | 0 gray fur : 5 black fur
3 | black fur x black fur | 1 gray fur : 3 black fur
4 | gray fur x gray fur | 4 gray fur : 0 black fur

a. Identify the most likely inheritance pattern (dominant-recessive, incomplete dominance, codominance, sex-linked, polygenic, multiple alleles) for fur color in wolves.

b. Explain how the information about family 3 supports the inheritance pattern you identified in part (a).