The BRCA2 protein functions in double-strand break repair. If a woman is heterozygous for a loss-of-function allele of BRCA2, she
A) will develop cancer because two functional copies of BRCA2 are needed in every cell.
B) will not get cancer because BRCA1 can compensate for the loss of BRCA2.
C) will develop cancer after several mutations occur, even if the mutations occur in different clonal populations of cells.
D) may develop cancer because mutation of the wild-type BRCA2 allele could destroy an important DNA repair mechanism.
D) may develop cancer because mutation of the wild-type BRCA2 allele could destroy an important DNA repair mechanism.
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This atom in its unbound state has four valence electrons. These electrons readily form single, double, and even triple bonds among themselves to become stable. This atom is:
A. carbon. B. hydrogen. C. oxygen. D. nitrogen. E. phosphorus.
Which system is considered an open system?
a. a human b. a thermos c. a wine keg d. a greenhouse e. the Earth
what is tolerance?
What will be an ideal response?
An organism with the genotype of AaXx can produce gametes containing __________ if the two genes
are unlinked. a. either Aa or Xx b. either AX, Ax, aX, ax c. AaXx d. AX or ax e. A,a,X,x