I showed you an elegant genetic experiment involving variation in flower color between two species of the flowering plants Mimulus lewisii and M. cardinalis. Which of these statements best represents the major take-home message from this experiment? Question 12 options: Trait differences that cause reproductive isolation can act pre-zygotically Sympatric speciation can be driven by a change in pollinator species Reproductive isolation can be caused by genetic changes at a very small number of loci Closely related species often hybridize
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Which of the following is true about sympatric speciation? The formation of host plant preferring varieties can reduce gene flow between two populations living in the same habitat. A vicariant event has to occur. There have to be differences in female preference for males. None of the other answers are correct
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Two phenotypes of the same flower are the purple shade and the magenta shade. Both flowers are pollinated, but by different organisms. The two flowers rarely ever cross-pollinate and produce a hybrid shade, the pale pink. This is an example of A. allopatric speciation. B. bottleneck effect. C. sympatric speciation. D. genetic drift.
Mimulus lewisii and Mimulus cardinalis are two plants that occupy the same habitat but do not interbreed in nature. However, they can be readily crossed in the laboratory to produce fertile offspring. Which of the following is a likely reason that prevents interbreeding of these plants in nature? They only reproduce by self-pollination. They have incompatible gametes. They show seasonal differences in flowering.
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