A hiatal hernia makes it easier for stomach acids to rise to the esophagus, usually called heartburn. To reduce this symptom It's important a diet that consists of
less: citrus, spicy, fried, fatty foods, coffee, tea, chocolate,
carbonated drinks, dairy products and tomato (because it's also acidic).
Some examples of appropriate foods are: apples, bananas, grains, soy milk, water, carrots, potatoes, peas, a low fat yogurt/cheese, (anything with low fat is ideal), etc.
DNA sequences can be similar for organisms that are related to each other but through various steps of meiosis like crossing over and law of independent assortment we can get genetic variations that lead to slight differences. We can also get differences in DNA sequences due to mutations.