K. What is the most likely mode of inheritance portrayed in the pedigree above?

Human Anatomy & Physiology (11th Edition)
11th Edition
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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### Pedigree Analysis

The image features a pedigree chart, which is a diagram representing the familial relationships and inheritance patterns of a specific trait or genetic condition within a family.

#### Key Features:

1. **Symbols**:
   - **Circles** represent females.
   - **Squares** represent males.
   - **Shaded symbols** indicate individuals expressing the trait.
   - **Unshaded symbols** are unaffected individuals.

2. **Generations**:
   - The chart is organized by generations, with parents at the top and their offspring below, connected by vertical lines.
   - Horizontal lines connect parents to each other.

3. **Inheritance Pattern**:
   - This pedigree shows both males and females affected in multiple generations.

#### Question

**K. What is the most likely mode of inheritance portrayed in the pedigree above?**

The pattern suggests an autosomal dominant inheritance:
- Both genders are affected.
- The condition appears in every generation, indicating a dominant trait.
- Affected individuals have a 50% chance of passing the trait to their offspring.

This analysis aids in understanding genetic inheritance and predicting the likelihood of future generations being affected by a similar trait.
Transcribed Image Text:### Pedigree Analysis The image features a pedigree chart, which is a diagram representing the familial relationships and inheritance patterns of a specific trait or genetic condition within a family. #### Key Features: 1. **Symbols**: - **Circles** represent females. - **Squares** represent males. - **Shaded symbols** indicate individuals expressing the trait. - **Unshaded symbols** are unaffected individuals. 2. **Generations**: - The chart is organized by generations, with parents at the top and their offspring below, connected by vertical lines. - Horizontal lines connect parents to each other. 3. **Inheritance Pattern**: - This pedigree shows both males and females affected in multiple generations. #### Question **K. What is the most likely mode of inheritance portrayed in the pedigree above?** The pattern suggests an autosomal dominant inheritance: - Both genders are affected. - The condition appears in every generation, indicating a dominant trait. - Affected individuals have a 50% chance of passing the trait to their offspring. This analysis aids in understanding genetic inheritance and predicting the likelihood of future generations being affected by a similar trait.
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