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Title: Sympatric Speciation and Diploid Plants? Post by: dreamingtruth on Mar 25, 2012 Can someone help me with this question? If there is an explanation as well that'd be great because I want to understand this. Thank you!
1. Sympatric speciation can occur when nondisjunction produces pollen and egg cells that are diploid. If these plants self-pollinate, a new tetraploid species can occur. Will it be able to breed with the original diploid plants? Answer a. No, it is isolated from the original diploid plants by a prezygotic barrier. b. No, it is isolated from the original diploid plants by a postzygotic barrier. c. Yes, but only if it happens during the first generation. d. Yes, since the original plants have all of the same chromosomes, it is possible. e. No, but for another reason that was not given. Title: Re: Sympatric Speciation and Diploid Plants? Post by: George on Mar 25, 2012 A sounds right, as the plant is selfed and tetraploid, so it is not able to form zygotes with the diploid plant.
Title: Re: Sympatric Speciation and Diploid Plants? Post by: dreamingtruth on Mar 25, 2012 The answer is not A, (I just gave in my test) but it doesn't say what the answer is so hopefully someone can offer some sort of explanation anyway? (:
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