What is self-incompatibility? Why does self-pollination not lead to seed formation in self-incompatible species?
Added by Theresa E.
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This prevents inbreeding in flowers of these plants by inhibiting pollen germination. Show more…
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What is the difference between self-pollination and cross-pollination? If pollen is transferred from the stamens of a flower to the stigma of the very same flower, is that self-pollination or cross-pollination? If it is transferred from the stamen of one flower to the stigma of another flower on the very same plant? If it is transferred from the stamen of one flower to the stigma of another flower on a different plant, but a plant that is a clone of the first one? Animals do not have pollen, of course, but why is it that most animals never have to worry about the equivalent problem of self-fertilization? Why cannot most animals fertilize themselves?
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a. EXPLAIN why genetic self-incompatibility mechanisms have independently evolved in many species of flowering plants? b. Which self-incompatibility mechanism (gametophytic or sporophytic) is more effective at preventing BIPARENTAL INBREEDING (e.g. full-sib mating)? WHY? (In your answer, be sure to clearly describe how each of the two incompatibility mechanisms function.)
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