試題詳解

12 A phosphorescent red strain of bacteria is heat-killed and mixed with a living, colorless strain. Further observations of the mixture show that some living cells are now red. Which observations would provide the best evidence that red color is a heritable trait?
(A)exceptionally bright red color in some members of the living strain
(B)as the living cells divide, the number of red cells increases
(C) when the heat-killed and living cells are mixed, there is a decrease in the overall amount of red color
(D) after a few generations, there are no more colorless cells. All cells are red