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Ch. 23 - Developmental Genetics

Chapter 22, Problem 7

What are zygotic genes, and when are their gene products made?

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Hi, everybody. Let's look at our next question. It says which of the following genes are transcribed in the embryonic nuclei formed after fertilization. Well, dreams, transcribing the embryonic nuclear formed after fertilization are called psychotic genes. Since they expressed transcribed and expressing the zygote. And the degree to which they are transcribed in regions of the zygote depend on the distribution of the maternal effect proteins that come from genes in the egg. And there's two types of psychotic genes. And that's the segmentation genes and the homoerotic jeans and the segmentation genes direct the development of the embryo into separate segments. While the homoerotic genes direct the fate and the beginning of the actual anatomical structures of the embryo. And there's three types of segmentation genes. So now that we kind of know are different types of psychotic genes, that would be the types that the question is asking for. Let's look at our answer choices and note that we do have choice d all of the above. So we can have more than one correct answer. So let's think about we've got our homoerotic genes. That's not an answer choice. And then we said there's three types of segmentation genes. So those are the gap jeans which is choice A, the pair rule genes, which is choice B and the segment polarity genes, which is choice C. So A B and C are all types of segmentation genes. So they're all answers to the question and therefore answers. Choice D all of the above. So which of the following genes are transcribed and that embryonic nuclei formed after fertilization. Choice D all of the above. See you in the next video.