The following pedigree shows a rare trait in unicorns. Affected individuals (purple) have a stub instead of a horn. What is the probability that the III-1 individual will be a male and have a horn? ?

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### Pedigree Analysis in Unicorns

In the study of genetics, a pedigree chart is often used to analyze the inheritance patterns of traits across generations. Here, we have a pedigree chart for unicorns illustrating a rare trait that results in a stub instead of a horn. Affected individuals are shaded in purple.

**Description of the Pedigree Chart:**

- **Symbols**: 
  - Squares represent males.
  - Circles represent females.
- **Shading**:
  - Purple shading indicates affected individuals with the stub trait.

**Generations:**

- **First Generation**:
  - One male and one female, both unaffected (unshaded).
  
- **Second Generation**:
  - Three individuals: one female (affected) and two males (one affected, one unaffected).
  
- **Third Generation**:
  - One individual indicated by a “?” in a shaded purple square, suggesting that the query is about a potential male individual.

**Question Posed**:

The question asks for the probability that the III-1 individual (descendant in the third generation) will be a male with a horn.

**Inference**:

The III-1 individual is represented as a square with a question mark, suggesting uncertainty about the individual's gender or trait expression. To determine the probability, consider the pattern of inheritance, the sex-linked characteristics, and the phenotypes of the parents. It may involve a deeper understanding of genetic probability, considering whether the trait is dominant or recessive.
Transcribed Image Text:### Pedigree Analysis in Unicorns In the study of genetics, a pedigree chart is often used to analyze the inheritance patterns of traits across generations. Here, we have a pedigree chart for unicorns illustrating a rare trait that results in a stub instead of a horn. Affected individuals are shaded in purple. **Description of the Pedigree Chart:** - **Symbols**: - Squares represent males. - Circles represent females. - **Shading**: - Purple shading indicates affected individuals with the stub trait. **Generations:** - **First Generation**: - One male and one female, both unaffected (unshaded). - **Second Generation**: - Three individuals: one female (affected) and two males (one affected, one unaffected). - **Third Generation**: - One individual indicated by a “?” in a shaded purple square, suggesting that the query is about a potential male individual. **Question Posed**: The question asks for the probability that the III-1 individual (descendant in the third generation) will be a male with a horn. **Inference**: The III-1 individual is represented as a square with a question mark, suggesting uncertainty about the individual's gender or trait expression. To determine the probability, consider the pattern of inheritance, the sex-linked characteristics, and the phenotypes of the parents. It may involve a deeper understanding of genetic probability, considering whether the trait is dominant or recessive.
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