What is unusual about the inheritance of retinoblastoma,given that it appears to be inherited as a dominant trait?

Question

Quizplus · Accepted Answer

Although retinoblastoma is usually inherited as a dominant trait, not all children who inherit the RB deletion actually develop the disease. This is because retinoblastoma is a complex disease that involves the interplay of multiple genetic and environmental factors, in addition to the RB gene itself. Some children may inherit other genetic variants that protect against the development of retinoblastoma, or they may not be exposed to the necessary environmental triggers that activate the RB deletion. Therefore, the inheritance of the RB deletion alone does not guarantee that a child will develop retinoblastoma.

What Is Unusual About the Inheritance of Retinoblastoma,given That It