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Ch. 47 - Animal Reproduction and Development
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All textbooksFreeman 8th EditionCh. 47 - Animal Reproduction and DevelopmentProblem 5

Chapter 46, Problem 5

A friend is interested in isolating genes that are expressed solely in liver cells but only has access to skin cells. She asks you for advice on whether to start her studies. What will you say?

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Hi everyone. Let's look at the next problem. It says which of the following incorrectly describes skin and liver cells. So let's look at our answer choices remembering that we were looking for an incorrect or false answer. So Choice A. Says they have the same D. N. A. But that is true. Every cell in your body has the same D. N. A. It's just differentially expressed depending on what type of cell it is. So Choice A. Is not our answer. Choice B. Says they have different genes. Well that is not correct. That is false. Um As we said in choice say they have the same DNA they have the same genes present in those cells. In that genome the genes are just expressed differently. Different genes expressed to help differentiate different cell types. So that would be our correct answer since it's the incorrect description. But we'll keep looking at the other answers. Choice C. Says they use their genes differently. This is true. So they have the same genes but those genes are expressed differently since they're different cell types. So Choice C. Is not our answer. And finally Choice D. They can choose which gene to turn on and off. And this is true. That's how they differentiate different genes are expressed or turned off in different cell types. So again which of the following incorrectly describes skin and liver cells. Choice B. They have different genes. See you in the next video
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