A woman inherits a mutant BRCA1 allele from her mother. She has an increased risk of developing breast cancer because
A. some of the cells in her body are already cancerous, meaning that no further mutations are needed for a tumor to form.
B. every cell in the woman's body has a copy of the mutant BRCA1 allele.
C. she still has one normal allele of the BRCA1 gene that can make up for the loss of function in the mutant allele.
D. a mutation in her normal BRCA1 allele may lead to cancer, whereas a normal individual would have to acquire two mutations (one in each allele) to develop cancer.
E. the normal BRCA1 allele is more likely to mutate than in an individual without a mutant BRCA1 allele.
Answer: D
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a. available inorganic compartment; unavailable inorganic compartment b. unavailable inorganic compartment; unavailable organic compartment c. available inorganic compartment; available organic compartment d. available inorganic compartment; unavailable organic compartment e. available organic compartment; unavailable inorganic compartment
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Fill in the blank(s) with the appropriate word(s).