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Ch. 38 - Flowering Plant Reproduction and Development
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All textbooksFreeman 8th EditionCh. 38 - Flowering Plant Reproduction and DevelopmentProblem 10

Chapter 37, Problem 10

Make a sketch of a simplified flower with all four organs, and indicate how the pattern of expression for just two genes (e.g., 'D' and 'E') could, hypothetically, regulate the development of each organ. Consider that what's important is whether a gene is on or off and that a structure can be specified when neither gene is expressed.

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Welcome back. Let's look at our next problem. It says according to the abc model of flower development, the interaction between Class A. And blank jeans affects the development of petals. Well, let's think back and recall from our content videos what the abc model of flower development is. And I'm just going to briefly put up a little diagram of this model. We recall that when a plant transitions to the reproductive phase, uh these different genes interact together to act on the floral mary stem, which contains undifferentiated stem cells. And then the interaction of the genes brings forth the development of the different reproductive structures that make up the flower. So let's look at our answer choices. Kind of referring back to our diagram here. Choice A says class B. And again we're looking at the development of the pedals and the interaction between class A. And which. So when we look here for our pedals, we see that that is the interaction between jean A. And jean B. Together affect the development of the pedals. So choice A. Is our correct answer. But let's just look through our other classes and see um why they're not correct or other answers. Excuse me. Class answer B. Says class C. Well, there is no interaction between class A. And class C. They don't work together to affect any developments that wouldn't be our answer choice C. Says class D. We don't have A class D. And so that's not an answer and choice D. Says all well again, they do not all interact together to develop the pedals here. So that's also not our answer choice. So class choice A is our correct answer. The interaction between Class A and class B is what affects the development of the pedals. In the abc model of flower development. See you in the next video.
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