Two parents heterozygous for cystic fibrosis have a child with the disease. The parents are expecting a second child. What is the probability that the second child will also have cystic fibrosis?

A) 100% probability
B) 75% probability
C) 50% probability
D) 25% probability
E) 0% probability

Cystic Fibrosis

Cystic Fibrosis is a genetic disorder that affects the respiratory and digestive systems, leading to thick mucus production and respiratory infections.

Heterozygous

Having two different alleles for a particular gene, one inherited from each parent.

Probability

The measure of the likelihood that an event will occur, quantified as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.