Grade 10 Pedigree Analysis Worksheet
A worksheet for Grade 10 science students to practice analyzing pedigree charts and understanding inheritance patterns.
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Grade 10 Pedigree Analysis Worksheet
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Read each question carefully and analyze the provided pedigree charts to answer. Use your knowledge of Mendelian genetics and inheritance patterns.
Refer to the pedigree chart below, which traces the inheritance of a genetic disorder.
1. Is the inheritance pattern shown in the pedigree chart autosomal dominant, autosomal recessive, or X-linked recessive? Explain your reasoning.
2. What is the genotype of individual II-1 if 'A' represents the dominant allele and 'a' represents the recessive allele?
3. Which of the following is a characteristic of an X-linked recessive disorder?
Affected fathers pass the trait to all their daughters.
Affected mothers pass the trait to all their sons.
It primarily affects males, and affected sons typically have unaffected mothers who are carriers.
It affects males and females equally, and affected individuals always have at least one affected parent.
Complete the following sentences with the correct terminology.
4. A square in a pedigree chart represents a individual, while a circle represents a individual.
5. An individual who carries a recessive allele but does not express the trait is called a .
Indicate whether each statement is True or False.
6. In an autosomal dominant disorder, affected individuals must have at least one affected parent.
True
False
7. A pedigree chart can be used to predict the probability of offspring inheriting a genetic trait.
True
False
8. Explain how a recessive genetic disorder can appear in offspring when neither parent expresses the disorder.