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What fraction of the population has medium skin color? Refer to Figure 9.14 on page 173 of your textbook.

What fraction of the population has medium skin color? Refer to Figure 9.14 on page 173 of your textbook.

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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### Genetic Inheritance and Skin Color **Question 7:** What fraction of the population has medium skin color? Refer to Figure 9.14 on page 173 of your textbook. **Diagram Explanation:** The diagram illustrates the inheritance of skin color through three generations, using six alleles. 1. **P Generation:** - Two parents with genotypes AABBCC (very light skin) and aabbcc (very dark skin) are shown. 2. **F₁ Generation:** - Offspring with genotype AaBbCc (intermediate skin color) are produced from the parental genotypes. 3. **F₂ Generation:** - Shows a Punnett square with combinations of AaBbCc crossed with AaBbCc. The grid outlines possible genotypes and resulting phenotypes for skin color. - It consists of blocks of varying shades representing different skin colors, ranging from very light to very dark. **Graph:** - A bell curve is overlaid on a histogram displaying the distribution of skin colors across a hypothetical population. - The x-axis represents skin color, categorized into different genetic combinations, while the y-axis represents the number of individuals (phenotypic frequency). - The peak of the bell curve indicates the most common phenotype, which in this case is medium skin color, exhibiting a normal distribution pattern. This figure provides a visual representation of polygenic inheritance, showing how alleles from both parents contribute to the offspring's phenotype, resulting in a wide range of skin colors. Medium skin color, represented by AaBbCc, appears as the most frequent phenotype, evidenced by the peak in the bell curve.
Transcribed Image Text:### Genetic Inheritance and Skin Color **Question 7:** What fraction of the population has medium skin color? Refer to Figure 9.14 on page 173 of your textbook. **Diagram Explanation:** The diagram illustrates the inheritance of skin color through three generations, using six alleles. 1. **P Generation:** - Two parents with genotypes AABBCC (very light skin) and aabbcc (very dark skin) are shown. 2. **F₁ Generation:** - Offspring with genotype AaBbCc (intermediate skin color) are produced from the parental genotypes. 3. **F₂ Generation:** - Shows a Punnett square with combinations of AaBbCc crossed with AaBbCc. The grid outlines possible genotypes and resulting phenotypes for skin color. - It consists of blocks of varying shades representing different skin colors, ranging from very light to very dark. **Graph:** - A bell curve is overlaid on a histogram displaying the distribution of skin colors across a hypothetical population. - The x-axis represents skin color, categorized into different genetic combinations, while the y-axis represents the number of individuals (phenotypic frequency). - The peak of the bell curve indicates the most common phenotype, which in this case is medium skin color, exhibiting a normal distribution pattern. This figure provides a visual representation of polygenic inheritance, showing how alleles from both parents contribute to the offspring's phenotype, resulting in a wide range of skin colors. Medium skin color, represented by AaBbCc, appears as the most frequent phenotype, evidenced by the peak in the bell curve.
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