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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16) If individuals III-2 and III-3 have an additional child, what are the chances that it'll be an unaffected boy?

Transcribed Image Text:## Pedigree Chart Analysis
The image contains a pedigree chart used to track the inheritance of a specific trait through several generations in a family.
### Explanation of the Pedigree Chart
The pedigree consists of four generations, labeled with Roman numerals I to IV on the left-hand side.
**Legend:**
- Squares represent males.
- Circles represent females.
- Filled shapes indicate individuals expressing the trait.
- Half-filled shapes indicate carriers of the trait (heterozygous individuals).
- Blank shapes indicate individuals not expressing the trait, nor carriers.
### Generations
**Generation I:**
- Individual 1: Male, carrier of the trait (half-filled square).
- Individual 2: Female, does not express the trait (blank circle).
**Generation II:**
- Individual 1: Female, does not express the trait (blank circle).
- Individual 2: Male, expresses the trait (filled square).
- Individual 3: Female, carrier of the trait (half-filled circle).
- Individual 4: Male, does not express the trait (blank square).
**Generation III:**
- Individual 1: Male, does not express the trait (blank square).
- Individual 2: Female, expresses the trait (filled circle).
- Individual 3: Male, carrier of the trait (half-filled square).
- Individual 4: Female, does not express the trait (blank circle).
- Individual 5: Female, does not express the trait (blank circle).
**Generation IV:**
- Individual 1: Male, expresses the trait (filled square).
- Individual 2: Female, does not express the trait (blank circle).
- Individual 3: Male, expresses the trait (filled square).
### Question and Opportunities
Below the pedigree chart, a multiple-choice question is presented, with the question indicated by a black circle:
- Select the correct probability regarding a given trait.
- 1/2
- 3/8 (selected)
- 1/8
- 1/16
- 1/4
This pedigree chart helps in understanding the mode of inheritance of a certain genetic trait within a family, which can be crucial for genetic counseling, risk assessment, and understanding hereditary patterns.
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