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The following image shows Nondisjunction. Which of the following cells will suffer from a genetic disorder due to the occurence of Nondisjunction:

The following image shows Nondisjunction. Which of the following cells will suffer from a genetic disorder due to the occurence of Nondisjunction:

Human Anatomy & Physiology (11th Edition)
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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**Title: Nondisjunction and Its Impact on Genetic Disorders** The following image shows Nondisjunction. Which of the following cells will suffer from a genetic disorder due to the occurrence of Nondisjunction: --- **Diagram Explanation:** 1. **Left Panel - (a) Nondisjunction of homologous chromosomes in Meiosis I:** - **Meiosis I**: The diagram shows a pair of homologous chromosomes failing to separate (nondisjunction) during the first meiotic division. As a result, one cell has both homologous chromosomes, while the other cell has none. - **Meiosis II and Gametes**: - The cell with both homologous chromosomes divides into two gametes, each with an extra chromosome (n + 1). - The cell with no chromosomes divides into two gametes, each with one less chromosome (n - 1). 2. **Right Panel - (b) Nondisjunction of sister chromatids in Meiosis II:** - **Meiosis I**: This part proceeds normally, with homologous chromosomes separating. - **Meiosis II**: - One of the resulting cells from Meiosis I undergoes nondisjunction, where sister chromatids fail to separate. This results in one gamete with two sister chromatids (n + 1) and one gamete with none (n - 1). - The other cell from Meiosis I divides normally into two gametes with the correct number of chromosomes (n). The diagram effectively shows how nondisjunction during different stages of meiosis leads to gametes with abnormal chromosome numbers, which can cause genetic disorders. **Options:** - ○ n - 1 - ○ n - ○ n + 1 - ○ More than 1 of the answers
Transcribed Image Text:**Title: Nondisjunction and Its Impact on Genetic Disorders** The following image shows Nondisjunction. Which of the following cells will suffer from a genetic disorder due to the occurrence of Nondisjunction: --- **Diagram Explanation:** 1. **Left Panel - (a) Nondisjunction of homologous chromosomes in Meiosis I:** - **Meiosis I**: The diagram shows a pair of homologous chromosomes failing to separate (nondisjunction) during the first meiotic division. As a result, one cell has both homologous chromosomes, while the other cell has none. - **Meiosis II and Gametes**: - The cell with both homologous chromosomes divides into two gametes, each with an extra chromosome (n + 1). - The cell with no chromosomes divides into two gametes, each with one less chromosome (n - 1). 2. **Right Panel - (b) Nondisjunction of sister chromatids in Meiosis II:** - **Meiosis I**: This part proceeds normally, with homologous chromosomes separating. - **Meiosis II**: - One of the resulting cells from Meiosis I undergoes nondisjunction, where sister chromatids fail to separate. This results in one gamete with two sister chromatids (n + 1) and one gamete with none (n - 1). - The other cell from Meiosis I divides normally into two gametes with the correct number of chromosomes (n). The diagram effectively shows how nondisjunction during different stages of meiosis leads to gametes with abnormal chromosome numbers, which can cause genetic disorders. **Options:** - ○ n - 1 - ○ n - ○ n + 1 - ○ More than 1 of the answers
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