1. Mendelian Genetics

Pedigree Analysis — Quiz

Test your understanding of pedigree analysis with 5 practice questions.

Practice Questions

Question 1

A pedigree shows a rare disorder that affects both males and females. Affected individuals always have at least one affected parent, and the trait does not skip generations. What is the most likely mode of inheritance?

Question 2

In a pedigree, if a trait is observed in all sons of an affected mother, but never in the offspring of an affected father, what is the most likely mode of inheritance for this trait?

Question 3

A genetic disorder is observed in a family. The pedigree shows that only males are affected, and the trait is never passed from father to son. Affected males always have an affected mother or a carrier mother. Which mode of inheritance is most consistent with these findings?

Question 4

Consider a pedigree where a rare genetic condition is observed. If the trait is passed from an affected mother to all of her children (both sons and daughters), but never from an affected father to any of his children, what is the most likely mode of inheritance?

Question 5

In a pedigree analysis, a trait is found to skip generations, affect both males and females equally, and affected individuals often have unaffected parents. What is the most probable mode of inheritance?