Problem: Given the question: Mary had two children. Her firs born was named Bill and was normal, and her second child was named Sam and had Down syndrome. Which child didn't have a nondisjunction of chromosome 21?
++++++++++++++++++++++++++++++++
The answer is:
Bill

Problem: Given the question: Two smoker friends found out more about cancer. Bill got scared and started making healthy lifestyle choices, while Dan carried on with his life as if nothing happened. Which friend decided not to quit smoking?
++++++++++++++++++++++++++++++++
The answer is:
Dan

Problem: Given the question: Two people went to the eye doctor's office for an annual exam; James had farsightedness, while Bob had myopia. Which person had the eyeballs shorter than normal?
++++++++++++++++++++++++++++++++
The answer is:
James