In this chapter, we focused on epigenetic modifications to the genome that regulate gene expression. Several mechanisms are involved, and epigenetic control of gene expression is important in development, cancer, and modulating the genomic response to environmental factors. From the explanations given in the chapter,

How does an environmental factor like stress generate a response that is transmitted from generation to generation?

Video transcript

Hi, everyone. Let's take a look at this practice problem together, identify the incorrect statement about the EPI genome. Now recall that the Epp Egy Gnome is a complete description of all the epigenetic changes. Or you can also say it's the record of all the modifications to D N A in histamines. So let's identify the incorrect statement. We've got a, it refers to the molecular alterations to the genome in response to environmental cues throughout the life cycle. Now, this is a true statement. Therefore, they cannot be the correct answer. Now, epi genome is a record of all the modifications that can occur due to environmental factors. So let's discuss option B, it is cell type specific. So it is specific to a single D N A cell type. So this is also true because different tissue cell types can have different epigenetic changes. So B is not the correct answer. Then we've got options. See it can be transmitted to the daughter cells by mitosis, mitosis produces genomic li identical daughter cells, two of them. And therefore, the epigenetic changes would be passed on to those daughter cells as well. So this is also true. So C is not the correct answer. So the correct answer is D it can also be transmitted to the future generations by mitosis. And the reason why this is the incorrect statement is because mitosis does not transmit genomic DNA on to future generations, but it is may aosis that does this. Therefore, option D is the incorrect statement. Alright. Everybody, I hope you found this helpful and I'll see you soon for the next practice problem.