If you've ever seen a litter of kittens, you may know that many of them barely look related. With coats ranging from black to white, tortoiseshell to tabby, and even long-haired to short-haired, littermates can look quite different from each other.
So why do kittens often not resemble their close relations, whereas most human siblings look similar to each other? The answer comes down to the complicated nature of cat coat genetics and a phenomenon in cat ovulation.
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