What is the most likely mode of inheritance for the trait shown in the following pedigree? This trait is rare and completely penetrant.

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The image presents a pedigree chart to determine the most likely mode of inheritance for a specific trait, which is described as rare and completely penetrant.

### Diagram Details:
- **Generations:** The pedigree is divided into four generations (I to IV).
- **Symbols:**
  - Squares represent males.
  - Circles represent females.
  - Filled symbols indicate individuals expressing the trait.
  - Empty symbols denote individuals not expressing the trait.

### Generational Breakdown:

- **Generation I:**
  - One unaffected male (square) married to an unaffected female (circle).

- **Generation II:**
  - Individual 1 is a male expressing the trait.
  - Individuals 2 (female), 3 (male), and 4 (female) are unaffected.

- **Generation III:**
  - Includes five individuals:
    - Females 1, 2, and 4, and male 5 are unaffected.
    - Female 3 is affected.

- **Generation IV:**
  - Includes six individuals:
    - Females 1, 2, 5, and male 4 are unaffected.
    - Males 3 and 6 are affected.

### Inheritance Mode Options:
- Y-linked
- Autosomal dominant
- Autosomal recessive
- X-linked recessive
- X-linked dominant

The goal is to evaluate the inheritance pattern based on how the trait appears across the generations.
Transcribed Image Text:The image presents a pedigree chart to determine the most likely mode of inheritance for a specific trait, which is described as rare and completely penetrant. ### Diagram Details: - **Generations:** The pedigree is divided into four generations (I to IV). - **Symbols:** - Squares represent males. - Circles represent females. - Filled symbols indicate individuals expressing the trait. - Empty symbols denote individuals not expressing the trait. ### Generational Breakdown: - **Generation I:** - One unaffected male (square) married to an unaffected female (circle). - **Generation II:** - Individual 1 is a male expressing the trait. - Individuals 2 (female), 3 (male), and 4 (female) are unaffected. - **Generation III:** - Includes five individuals: - Females 1, 2, and 4, and male 5 are unaffected. - Female 3 is affected. - **Generation IV:** - Includes six individuals: - Females 1, 2, 5, and male 4 are unaffected. - Males 3 and 6 are affected. ### Inheritance Mode Options: - Y-linked - Autosomal dominant - Autosomal recessive - X-linked recessive - X-linked dominant The goal is to evaluate the inheritance pattern based on how the trait appears across the generations.
**Question:** Two unaffected parents, Sam and Liz, have a child who displays an autosomal recessive genetic disorder. Sam and Liz would like to have four more children. What is the probability that one of those children will be affected and three will be unaffected?

Use two decimal places for your answer. If your answer is less than 1, list a 0 in the ones place. For example, if your calculated answer is 0.9781, you should enter 0.98.

**Answer Box:**  
Type your answer...
Transcribed Image Text:**Question:** Two unaffected parents, Sam and Liz, have a child who displays an autosomal recessive genetic disorder. Sam and Liz would like to have four more children. What is the probability that one of those children will be affected and three will be unaffected? Use two decimal places for your answer. If your answer is less than 1, list a 0 in the ones place. For example, if your calculated answer is 0.9781, you should enter 0.98. **Answer Box:** Type your answer...
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