Genetics is the study of variations among people that are determined by the heritable units called genes and how the variations occur and are transmitted in individuals, families, and populations.
Note
The study of how mutations in single genes cause rare disease (genetics) is gradually being eclipsed by research on how mutations in multiple genes interact with each other and the environment to result in health and disease.
There is an intricate interaction among genes, hormones, enzymes, membrane receptors, neuron networks, and so on that creates a maze of connections that prescribes our individual functional and developmental path.1
Reference
1.
Genetics: Unity and Diversity. In: Schaefer G, Thompson, Jr. JN. eds. Medical Genetics: An Integrated Approach. McGraw-Hill Education; 2017. Accessed December 21, 2025. https://accessmedicine.mhmedical.com/content.aspx?bookid=2247§ionid=173743686