Question

Both, Mary’s mother, and her maternal grandmother had breast cancer due to a BRCA1 mutation (P=0.80). Mary is pregnant with a girl. What is the probability that Mary’s daughter in adulthood will suffer from breast cancer?

Answer 1

The probability that Mary's daughter will suffer from breast cancer in adulthood is 75 percent.

Step-by-step explanation:

The probability that Mary's daughter in adulthood will suffer from breast cancer can be calculated using the information provided. Given that both Mary's mother and her maternal grandmother had breast cancer due to a BRCA1 mutation (P=0.80), we can assume that Mary carries the gene mutation as well. The BRCA1 mutation increases the risk of breast cancer in women to 75 percent. Therefore, the probability that Mary's daughter will suffer from breast cancer in adulthood is also 75 percent.