Final answer:
Yes, a person is more likely to be obese if their parents and grandparents are obese.
Step-by-step explanation:
True
When both parents and grandparents are obese, there is a higher likelihood that their offspring will also be obese. This is because genetics plays a significant role in determining body weight and metabolism. Studies have shown that when both parents are obese, 80 percent of their offspring will be obese, compared to less than 10 percent when both parents are of normal weight.