How do genetics influence lifestyle-related diseases?

Genetics play a complex role in lifestyle-related diseases by creating a predisposition to certain health conditions. This means that individuals may inherit genes that increase their risk for diseases such as diabetes, heart disease, or obesity. However, the expression of these genetic tendencies is significantly influenced by lifestyle factors, including diet, physical activity, and environmental exposures.

For instance, a person may have a genetic predisposition to diabetes, but whether they develop the condition can largely depend on their lifestyle choices — such as maintaining a healthy diet and engaging in regular exercise. Therefore, while genetics can set the stage for potential health issues, lifestyle modifications can often mitigate these risks or prevent the onset of the disease altogether. This interplay highlights the importance of addressing both genetic factors and lifestyle choices in the prevention and management of diseases.

The other options incorrectly simplify the relationship between genetics and lifestyle-related diseases. Genetics are not the sole determining factor for disease, nor do they guarantee that an individual will develop a condition. Additionally, to say that genetics have no effect is misleading, as they certainly influence individual susceptibility.