Jessica is working on a large research project that follows people who have inherited a gene for a particular disorder.She wants to determine whether diet and exercise will alter the likelihood that those people will experience the symptoms of the disorder.What is Jessica's field of study

A)  epigenetics
B)  genetic mapping 
C)  evolutionary psychology
D)  behaviour genetics

Jessica is studying the interaction of environmental factors (diet and exercise) with inherited genes, which falls under the field of epigenetics. Genetic mapping typically involves identifying the location of specific genes on a chromosome, and evolutionary psychology focuses on how behavior has evolved over time. Behavior genetics also explores the influence of genetics on behavior, but it does not specifically look at the interaction between genes and environmental factors.