Pedigree Patterns Quiz

In an autosomal dominant pedigree, what is the likelihood of an affected individual having an affected parent?

• 0%

• 25%

• 50%

• 100%

Which characteristic is typical of an autosomal recessive pedigree?

• Every generation shows the trait.

• Males and females are affected equally.

• Only males are affected.

• Affected individuals often have unaffected parents.

In a X-linked recessive pedigree, which gender is more likely to be affected?

• Males

• Females

• Both equally

• Cannot be determined

What pattern of inheritance is suggested if a trait appears in every generation?

• Autosomal recessive

• Autosomal dominant

• X-linked recessive

• X-linked dominant

If a father is affected by an X-linked dominant disorder, what is the probability of his sons being affected?

• 0%

• 25%

• 50%

• 100%

In an autosomal recessive pedigree, two unaffected parents have an affected child. What is the most likely genotype of the parents?

• Both are carriers.

• One parent is affected.

• Neither parent is a carrier.

• It is impossible to determine.

Which of the following is a characteristic of an X-linked recessive pedigree?

• Affected fathers can pass the trait to their sons.

• All daughters of affected fathers are carriers.

• Affected mothers will have all affected sons.

• The trait skips generations.

In a pedigree chart, what does it indicate if a trait is more common in males and is not seen in every generation?

• Autosomal dominant

• Autosomal recessive

• X-linked dominant

• X-linked recessive

If a trait is observed in both males and females but all affected individuals have an affected parent, what type of inheritance is most likely?

• Autosomal dominant

• Autosomal recessive

• X-linked dominant

• X-linked recessive

What is a key feature of an X-linked dominant pedigree?

• Affected males pass the trait to all of their daughters but none of their sons.

• Affected males pass the trait to their sons only.

• Affected females pass the trait to half of their children, regardless of gender.

• The trait is only seen in females.