Bad news: Weight identity is ingrained in our DNA. Even worse, it seems to be particularly strong in women. Basically, this means your genes can make you feel "fat". In fact, they found that how you feel about your weight has a heritability of 47 per cent. In the scale of heritability, zero per cent means that genes don’t contribute to a certain trait at all, while 100 per cent means that they are the only contributing factor. These findings are important as an individual’s selfperception plays a major role in physical health. and durability.