Grade 12 Pedigree Analysis Worksheet
Analyze and interpret pedigree charts to understand inheritance patterns of genetic traits.
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Grade 12 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 inheritance patterns to determine genotypes, phenotypes, and probabilities.
Consider the following pedigree chart for a genetic disorder.
1. Is the disorder shown in the pedigree chart dominant or recessive? Justify your answer.
2. What is the most likely mode of inheritance for the trait shown in the pedigree?
Autosomal dominant
Autosomal recessive
X-linked dominant
X-linked recessive
3. In a pedigree, a square represents a , and a circle represents a .
4. If a trait is X-linked recessive, affected females must have an affected and an affected .
5. A carrier in a pedigree chart is typically represented by a half-filled shape.
True
False
6. Mitochondrial inheritance patterns show that affected mothers pass the trait to all of their children.
True
False
7. Explain how to distinguish between an autosomal recessive and an X-linked recessive inheritance pattern in a pedigree chart.