Simply create a dihybrid cross, and then create ratios from the outcomes. Remember that ratios only come from the bottom part of any fractions *If you need more help on dihybrid crosses I can send an example image
C. is essential in the synthesis of dna and in the development of red blood cells.
Since Jordan needs to use the high power objective in order to view the specimen under the light microscope. He should use the ocular lens in order to view the high power objective which is placed in the objective lenses. So he needs to use the ocular lens for viewing and the objective lens to magnify and see the specimen clearly on the stage.