Abstract
MY cat has four kittens; two of them are black and white, and two are black. They are only three weeks old now, but from the beginning they have always been in two pairs according to their colour. Is there any reasonable explanation for this?
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RUSSELL Selective Association in Kittens. Nature 122, 478 (1928). https://doi.org/10.1038/122478f0
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DOI: https://doi.org/10.1038/122478f0
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