Which of the following is accurate about transmission of an autosomal recessive trait, such as the defective gene of cystic fibrosis?
a. 25% of children born to two carriers of the gene mutation will be affected by the disease
b. All male offspring born to two carriers of the gene mutation will be affected by the disease, while none of the female offspring will be affected
c. Half of the female offspring born to two carriers of the gene mutation will be carriers of the gene mutation and half of the male offspring will be affected by the disease
d. 50% of all offspring born to two carriers of the gene mutation will be affected by the disease