Question: Which of the following are possible results of differential gene expression in a fruit fly? Choose 2 answers: (Choice A) a change in the abundance of a cellular protein in response to an environmental factor A a change in the abundance of a cellular protein in response to an environmental factor (Choice B) a change in the amount of DNA in certain cell types B a change in the amount of DNA in certain cell types (Choice C, Checked) the production of a certain protein in eye cells, but not in brain cells C the production of a certain protein in eye cells, but not in brain cells