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Calico cats are pretty, but also, biologically interesting! If you see a Calico cat, you can quickly tell it’s gender: Female! All Calico cats are female because the gene for their fur pattern is on the same chromosome that determines gender. Even though Richard Scarry’s Busy Town featured a family of male and female Calico cats! It was all a sham! These lovely ladies are all girls:



(via Trish Hamme)



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(via tanakawho)



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