text: If you are referring to the role the study of genetics plays in your daily life, to be honest, that should not be the question, as the field is larger than someone's everyday life. Because genetics studies genes and their expression, inactivation, regulation and so on, you probably do not see any tangible effect of the studies everyday. However, you can ask what these genes and their expression present for any individual everyday. In that case, the question would be a plethora of survival means in short. Starting from metabolism, where the expression of a certain gene that allows the breakdown of glycogen into glucose in respiring tissues during starvation,to the synthesis of a an amino acid that is important for the functioning of a certain protein, genes and their expression play very big roles. Homeostatsis, keeping your inside environment constant, is due to gene expression and we probably would not be sitting here discussing the issue if it was not for these important events. So, wouldn't you say it is necessary to know why such complex systems work the way they do and fail the way they fail in people with illnesses so that in the unfortunate event that happens, correction can be carried out? Genetics does study these things and lends usable knowledge to gene therapy. I think all your questions regarding genetics are very good however, this one and the previous two.