Roberts Syndrome Is an Extremely Rare Genetic Disorder That Is

Multiple Choice

Roberts Syndrome is an extremely rare genetic disorder that is characterized by mild to severe prenatal retardation or disruption of cell division,leading to malformation of the bones in the skull,face,arms,and legs.Shown below is a pedigree for a family with Robert's Syndrome.What is the genotype of individual II-C? (R = wild type;r = Robert's syndrome)

A) RR
B) rr
C) Rr
D) R
E) r