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"For any , the of the should mean the loss of and the €demise of the . So how the spiny manages without a Y chromosome has puzzled for decades. Now, Asato  at in and her colleagues have shown that one of the rat’s normal chromosomes has effectively evolved into a new ."

newscientist.com/article/23488

#chromosome #sex #male #japan #hokkaidouniversity #kuroiwa #biologists #rat #amami #species #males #ychromosome #loss #mammal

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