AP Biology· difficulty 3/5
Polyploidy (extra sets of chromosomes) is a common mechanism of instant sympatric speciation in
Plants (e.g., wheat, cotton)
Mammals (e.g., mice, cattle)
Birds (e.g., finches, doves)
Reptiles (e.g., lizards, snakes)
Explanation
Plants tolerate polyploidy well; many crop species are polyploid. Animals rarely become polyploid (often lethal).
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