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I'd asked Rabbi Hershel Welcher of Queens a similar question, about goats that were given a bit of spider genes so they would produce gossamer in their milk. He felt the concept of "zeh v'zeh gorem, mutar" applied -- as the spider genes would not have sufficed to produce an organism, such a goat is kosher. So the same should apply here.


Kosher speciation Generally speaking, we have a rule that "kol hayotzei min hatahor tahor, vichol hayotzei min hatamei tamei" ("that which comes from a kosher species is kosher, and that which comes from a non-kosher species is non-kosher"; see Bekhoroth 1:2). Since this new species comes from kosher and non-kosher species, there would be several potential ...

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