Worldfamous medical doctor that dabbles in research from tim

World-famous medical doctor that dabbles in research from time to time, you\'ve taken a recent interest in a newly discovered c that appears to cure Sheltonitis, a terrible disease in which the affected suffers from superiority complex and other associated symptoms. However, this drug appears to work in only 33% of patients, while the remaining 67% seem completely immune to the drug. You head to your basement lab with your data to solve the mystery. 1. You have complete family history for a large family in which every family member is affected by Sheltonitis. You\'ve constructed a family tree to discern the heritability of the drug- susceptibility phenotype. RR Rr RR RR RR Rr RR RR

Solution

As the parents of the father of the propositus are RR and rr, the father\'s genotype would be Rr.
that combined with rr will give two types of progeny: Rr or rr. So there is a 50% chance that the propositus will be cured by the drug.