Question: In cats, the dominant O allele of the X-linked
orange gene is required to produce orange fur; the…
In cats, the dominant O allele of the X-linked
orange gene is required to produce orange fur; the
recessive o allele of this gene yields black fur.
a. Tortoiseshell (calico) 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.
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