In some types of cattle, brown hair and white hair share dominance. When two cows reproduce, they can have offspring that have both brown and white hair.
B-brown hair
B' – white

i think it is true in my reasonment ..

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.