Answer :
Final answer:
Doctors test for a BRCA1 mutation through genetic diagnosis by genetic testing. In cases of breast cancer, women are possibly advised to undergo biopsy for the medical team to identify the genetic basis of cancer. If it is found that the cancer is caused by inherited gene mutations such as BRCA1, other female relatives are also suggested to get tested.
Explanation:
The testing for the presence of a BRCA1 mutation is a process referred to as genetic diagnosis by genetic testing. When a disease-causing gene like BRCA1 is suspected, based on the inheritance patterns or family history of disease, doctors advise family members to undergo genetic testing. Specifically, in the case of women diagnosed with breast cancer, they are suggested to have a biopsy so the medical team can determine the genetic basis of the cancer development. If the cancer is found to be caused by inherited gene mutations such as the BRCA1 mutation, other female relatives are also advised to undergo genetic testing and periodic screening for breast cancer. Furthermore, genetic testing can also determine the presence or absence of disease-causing genes in fetuses or embryos with in vitro fertilization in families with specific debilitating diseases.
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