John, a 27-Year-Old White Male, with a PMHx of Familial

John, a 27-year-old white male, with a PMHx of familial adenomatous polyposis (FAP) comes to the clinic because him and his wife are thinking about having children. He is concerned about passing FAP to his children because he knows that there is 50% chance of passing the condition to each of his children. He states that he had his colectomy when he was 16-years-old. What is true regarding the condition?

A) He cannot pass FAP to his children since he had his colon removed.
B) Since he had a colectomy, his chance of passing on FAP to his children reduced to 25%.
C) Since he had a colectomy, his chance of passing on FAP to his children increased to 75%
D) Even with a colectomy, he still has a 50% chance of passing FAP to each of his children.