Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:**Question:**
Your favorite gene is expressed only in liver cells. Describe what this gene's chromatin looks like in brain cells and liver cells.
**Your answer:**
*Write your response here...*
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**Explanation for Educational Website:**
This prompt focuses on gene expression and chromatin structure in different cell types.
**Gene Expression and Chromatin:**
- **Liver Cells:** When a gene is specifically expressed in liver cells, its chromatin is typically in an "open" state or euchromatin. This means that the chromatin is loosely packed, allowing transcription machinery to access the DNA easily and express the gene.
- **Brain Cells:** In cells where the gene is not expressed, such as brain cells in this scenario, the chromatin is likely in a "closed" state or heterochromatin. This form of chromatin is tightly packed, making the DNA less accessible for transcription and therefore the gene remains inactive.
Understanding these differences helps illustrate the regulation of gene expression and the role of chromatin in cellular specialization.
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