how do u solve this Scientists believe that a mutant form of an autosomal gene called BRCA1 may be associated with 5% to 10% of all cases of breast cancer. About 80% of women who inherit the gene in its defective form are likely to develop a cancerous breast tumor. Men who carry the faulty BRCA1 gene rarely develop breast cancer, but they may pass the gene to their offspring. SC 7. A couple has two children, a girl and a boy. The mother has a single mutant gene for breast cancer; the father is not a carrier of the mutant BRCA1 gene. What is the probability that their daughter has inherited the mutant BRCA1 gene? 75% 50% 25% 0%