Jan noticed that when she put a tomato in water, it sank. when she put an apple in water, it floated. why did the tomato sink while the apple floated?

In pea plants, yellow seed color (y) is dominant and green seed color (y) is recessive. based on the punnett squares, what are the chances that the offspring in the second generation will have green seeds? first generation y y y yy yy y yy yy second generation y y y yy yy y yy yy there is a % chance that the offspring will have green seeds.