Inheritance of Red-Green Color Blindness
Abstract
<h2>Cover Page</h2> <p>Case 2: Inheritance of Red-Green Color Blindness</p> <p>Student Name</p> <p>Institutional Affiliation</p> <p>Instructor's Name</p> <p>Course</p> <p>Date</p> <h2>Genetic Inheritance of Red-Green Color Blindness in Males</h2> <h3>Question #1</h3> <p>Most people who are color blind inherit the condition from their parents. A son inherits red-green color blindness from his mother through the 23rd chromosome, often known as the sex chromosome (Smail et al., 2019). The genetic code patterns responsible for normal color vision differ from those responsible for the red and green variants of color vision deficiency (CVD). The 23rd chromosome consists of an X and a Y chromosome in males and two X chromosomes in females. The X chromosome carries the gene responsible for the hereditary forms of red-green color blindness. Therefore, a male must inherit the color blindness gene on his X chromosome to be color blind. In contrast, a female would need to inherit the color blindness gene on both of her X chromosomes to be color blind.</p> <p>Additionally, although she would not be color blind, a woman who carries one copy of the X chromosome containing the color blindness gene is considered a carrier. Since mothers contribute an X chromosome to both sons and daughters, a son will inherit his single X chromosome from his mother. If that X chromosome carries the color blindness gene, the son will be color blind (Smail et al., 2019). In this situation, only the son could inherit the condition directly from the mother because a father passes his Y chromosome to his son and his X chromosome to his daughter. Consequently, a son cannot inherit a color blindness gene from his father. Because males require only one affected X chromosome, whereas females require two affected X chromosomes, males are more likely than females to experience red-green color blindness.</p> <h2>Genetic Conditions Required for Red-Green Color Blindness in Females</h2> <h3>Question #2</h3> <p>A red-green color-blind girl requires both a color-blind mother and a color-blind father. If the father is not color blind, the daughter cannot inherit two affected X chromosomes and therefore cannot be color blind. However, a daughter may become a carrier if she inherits one affected X chromosome from either a carrier mother or a color-blind father (Taylor, 2020).</p> <p>In this situation, the daughter may either carry the gene responsible for red-green color blindness or inherit normal color vision. This suggests that the father may have normal color vision, while the mother may either be a carrier or be color blind. Given that neither parent is color blind, the most likely explanation is that the mother is a carrier of the affected X chromosome and the father has normal color vision. In conclusion, the daughter may inherit the color blindness gene as a carrier or may inherit two normal X chromosomes and therefore not carry the condition.</p> <h2>References</h2> <p>Smail, H. O., Ismael, E. M., & Ali, S. A. (2019). Prevalence of color blindness among students of four basic schools in Koya City. <em>Journal of Advanced Laboratory Research in Biology, 10</em>(2), 31–34.</p> <p>Taylor, D. (2020). <em>Causes of Color Blindness: Function and Failure of the Genes That Detect Color.</em></p>