Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. Release your mouse button when the item is place. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your answers. Make a Punnett Square and answer the questions.

In some apple trees, red apples are dominant over yellow apples. Cross two hybrid apple trees.

Click once to select an item at the bottom of the problem.
Click again to drop the item in its correct place.