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lecture_16a2_08 - F lo w e r in g T im e FT F lo w e r M e...

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Flowering Time Flower Meristem Identity Flower Organ Identity Fruit Development FT APETALA1, LEAFY, CAULIFLOWER, (TERMINAL FLOWER) A, B, C, D FRUITFULL, SHATTERPROOF INDEHISCENT
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B A C C A B carpel petal petal stamen stamen sepal sepal 1 1 2 2 3 3 4
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normal flower
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sepal sepal petal petal stamen stamen carpel B B A C C A What gene prevents the B gene from being active in the center of flowers?
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In SUPERMAN mutants (SUP), the B activity expands into the center of the flower and converts the two carpels into two stamens. A C C A B B stamen stamen sepal sepal petal petal stamen
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Superman mutant
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The SUPERMAN gene normally functions to prevent B gene activity in the center of flowers A C C A B B stamen stamen sepal sepal petal petal stamen
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normal BC mutant ?? sepal sepal petal petal stamen stamen carpel B B A C C A A A A A
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normal BC mutant sepal sepal petal petal stamen stamen carpel B B A C C A A A A A sepal sepal sepal sepal sepal sepal *
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BC double mutant all organs are sepals
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sepal sepal petal petal stamen
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