Male calicos cat are rare cats, which displays the orange color present on the X chromosome.
The male calico cats have X and Y chromosomes. The X chromosome is responsible for the orange and red colors of the cats. The female cats can express both colors because females have XX chromosomes.
Since the male calico cat has only one X chromosome, it makes it rare for them to have the calico pattern.
The color of the fur color can be either black or orange, which is coded by two alleles present on the same locus of the chromosome.
One allele produces orange, whereas, the other allele produces orange. The X chromosome has an allele for orange color, which makes it rare for the male calico cats to express.
Therefore, the presence of X and Y chromosomes in males makes them have a rare orange color.
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