Question

A genetic disease is found in a family that affects the immune system, lungs, heart, and kidneys. A DNA analysis of several affected and unaffected family members determines that the disease is caused by a mutation in a single gene. What type of inheritance pattern is shown in this disease? (1 point)

Answers:

polygenic trait

pleiotropy

incomplete dominance

codominance

Answer 1

Pleiotropy.

Rationale: a single-gene mutation causing multiple, seemingly unrelated effects (immune system, lungs, heart, kidneys) is the definition of pleiotropy.