In cats, the dominant o allele of the x-iinked orange gene is required to produce orange fur, the recessive o allele of this gene yields black fur. a. tortoiseshell cats have coats with patches of orange fur alternating with patterns of black fur. approximately 90% of all tortoiseshell cats are females. what type of crosses would be expected to produce female tortoiseshell cats? b. suggest a hypothesis to explain the origin of male tortoiseshell cats. c. calico cats (most of which are females) have patches of white, orange, and black fur. suggest a hypothesis for the origin of calico cats.