Grade 11 Pedigree Analysis Worksheet
Analyze pedigree charts to understand inheritance patterns of genetic traits, including autosomal dominant, autosomal recessive, and X-linked traits.
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Grade 11 Pedigree Analysis Worksheet
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Carefully analyze the provided pedigree charts and answer the questions that follow. Use your knowledge of Mendelian genetics and pedigree symbols to determine inheritance patterns, genotypes, and probabilities.
Pedigree Chart 1: Analyze the following pedigree chart for a genetic disorder.
1. Is the trait shown in Pedigree Chart 1 dominant or recessive?
True
False
2. Is the trait autosomal or X-linked?
Autosomal
X-linked
Y-linked
Mitochondrial
3. Explain how you determined the mode of inheritance for the trait in Pedigree Chart 1.
4. If individuals II-1 and II-2 from Pedigree Chart 1 have another child, what is the probability that this child will be affected by the disorder? Show your work.
5. In a pedigree chart, squares represent and circles represent .
6. An individual who carries a recessive allele but does not express the trait is called a .
7. If a trait is X-linked recessive, affected will always pass the allele to all of their .
Match the pedigree symbol with its meaning.
8. Shaded square
a. Unaffected female
9. Unshaded circle
b. Affected male
10. Half-shaded circle
c. Carrier female