DNA Sibship Test - Sibling Genetics. Understanding Sibling Genetics. Each person is made up of billions of cells, and most of the cells in our bodies contain a full set of genetic information in the form of DNA (deoxyribonucleic acid). DNA acts much like a genetic blueprint, dictating how we look and develop.
The calories also vary depending on the type of bread, peanut butter and jam you select for your sandwich. A sandwich made with 2 slices of whole-wheat bread, 2 tablespoons of peanut butter and 1 tablespoon of jam comes to about 385 calories. The type of bread you use affects the calories in your sandwich.
Two tablespoons of plain, smooth peanut butter provide 188 calories, 8 grams of protein, about 16 grams of fat and 6.3 grams of carbohydrates, of which nearly 2 grams are fiber. Chunky peanut butter is nutritionally comparable to the smooth variety, according to USDA data.