Genetics are also part of the system based on which the population can be established. Genetics closely related to the habits and behaviors individuals develop during their life, particularly in terms of lifestyle choices. for instance, people who come from families whose members had a more active lifestyle and followed healthier diets, non-smoking andnon-drinking are more likely to follow the same pattern in their life.The example set by the family as well as the relationship with friends andfamily can have a great impact on one's general health . Nonetheless, genetics may play a role in the manner in which people cope with stress.