outline and evaluate the genetic explanation for obesity

• The FTO gene is located on chromosome 16 and regulates an enzyme associated with fat mass and obesity, individuals with a particular variant of this gene are thought to be at risk of obesity
• psychologists have discovered that individuals with the FTO gene and the higher 'obesity risk' variant have higher levels of the 'hunger hormone' ghrelin, in their blood
• High levels of ghrelin found in individuals with a certain FTO gene variant causes individuals to feel hungry again soon after eating a meal
• MC4R gene- helps to regulate hunger signals in the hypothalamus- mutations in this gene are related to hunger and early onset obesity
• ghrelin vs leptin= ghrelin= the hunger hormone, stimulates appetite and food intake, while leptin suppresses appetite and promotes satiety
• FTO gene hunger hormone, MC4R gene helps keep you full