A healthy 31 years old woman comes to the office as she and her husband desire a second child. The husband is infertile and the patients son, He was conceived via donaor insemination, was recently diagnosed with glycogen storage diseases type 2 (pompe disease). This rare autosomal recessive diseases is known to affect 1in 40,000 of the general population. Genetic testing confirm that the patient is carrier for the disease. a different sperm is selected with no personal or family history of pompe disease. however his carrier status is unknown . What is the probability of the patient having an affected child with the new sperm donor? and why? a// 1/4
b// 1/240
c// 1/400
d//1/800
e//1/40,000
f//1/160,000​