What type of cat would be the best control to compare with Calix?

Only the mother has two X chromosomes. The father is male, so he only had one X chromosome but the calico cat has a genotype of XXY. Only nondisjunction could cause Calix to have an XXY karyotype.

Explanation:

Cats with these combinations appear: white with orange spots, white with black and orange spots (calico), and white with black spots, respectively. The actual genetic composition is called the genotype, and the expression of the genes is the phenotype. Thus, calico is the phenotype for a cat with the genotype.

Explanation:

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