Oliver has inherited genes that put him at risk for developing diabetes, but because of his healthy diet and exercise he is not diabetic. this example demonstrates that human characteristics, including diabetes, are

The given blank can be filled with epigenetics.

Explanation:

The study of inherited alterations in gene expression, which do not comprise modifications to the principal sequence of DNA is known as epigenetics. It refers to a variation in phenotype without modification in genotype that in turn influences how the cells read the genes.  

Epigenetic change refers to a natural and regular happening, however, it can also be affected by many elements like the environment or the lifestyle, age, and disease state.  

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.