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Take the degu and the rat for example. The degu has 29 chromosome pairs Rats have 21 chromosome pairs. They are only share the same order ( Rodentia ) Would it be possible for them to reproduce?

( also , before someone says " they're not the same species , so obviously not" allow me to remind you of the mule , and the europeans have 1 - 4 percent Neanderthal )

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  • $\begingroup$ On the side of the question, there are a few words on the concept and definition of species that you might like to read. $\endgroup$ – Remi.b Feb 15 '16 at 6:15
  • $\begingroup$ What point are you trying to make about having odd number of chromosome pairs? What difference does it make? $\endgroup$ – Remi.b Feb 15 '16 at 18:48

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