Sophia learns that the chromosomes in reproductive cells undergo a process called "crossing over," which allows for greater genetic variation in the reproductive cells. She constructs a partial model, as shown, to illustrate the process of crossing over.

1. watermelon, papaya, oranges, bananas, and lemons are included in this food group. vitamin c 2. you need 6 or more servings of this food group each day vitamins d and a 3. found in fruit and keeps blood vessels healthy calcium 4. vitamins found in milk bread and grain 5. a mineral that strengthens bones fruit