Which option describes how genes control the traits of a cell? a. genes code for specific structures and molecules in a cell. those structures and molecules form the traits of the cell. b. genes determine how much energy goes to each organelle in the cell. the organelles form the traits of the cell. c. genes are molecules that organelles are made out of. once assembled into organelles, they form the traits of the cell. d. genes become building blocks for specific structures and molecules in a cell. those structures and molecules form the traits of the cell.