Introduction to Pedigrees
Explore the basics of pedigree charts, how to read them, and what they represent in genetics for Grade 6 science.
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Introduction to Pedigrees
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Read each question carefully and answer to the best of your ability. Refer to the provided pedigree chart for questions that require it.
Observe the pedigree chart below to answer the following questions.

1. In a pedigree chart, what does a square symbol typically represent?
Female
Male
Affected individual
Carrier
2. What does a shaded symbol in a pedigree chart usually indicate?
Unaffected individual
Affected individual
Carrier
Deceased individual
3. A pedigree chart is used to trace the inheritance of a specific through generations of a family.
4. In a pedigree, a horizontal line connecting two individuals indicates a .
5. Vertical lines extending downwards from a marriage line connect to the of that couple.
6. Explain the difference between a square and a circle in a pedigree chart.
7. Why are pedigree charts useful in genetics?
8. A half-shaded symbol in a pedigree chart represents a carrier.
True
False
9. Generations in a pedigree chart are typically indicated by Roman numerals.
True
False
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