Not only do we know about the genes that cause genetic defects but also those combinations of gene interactions that contribute to various late adulthood diseases like diabetes, high blood pressure, cardiac vascular and neurological diseases spectrum. It is also possible to scan the genes not only in adults in prenatal states but also in the embryo at a time when the development is less than even 100 hours.
Prospective couples can plan to assess the genes and get married to rule out genetic defects.
Thus, gene scan contributes to the preventive medicine also. Unfortunately we do not realize that our endowment of genes inherently clashes with changing lifestyles contributing to the morbidity and mortality. The lifestyles of mankind have undergone enormous changes. Not only food habits have changed but also we are exposed to innumerable chemicals molecules that endanger genes. The food we eat, the water we drink and the air we breathe has become contaminated with chemicals that lead to life threatening situations.