Final answer:
Neurobiology investigates specific genes and their roles in cellular behavior, while Behavioral genetics looks at behavior to determine genetic influences. Epigenetics is the study of heritable changes in gene expression that do not alter the DNA sequence itself.
Step-by-step explanation:
The answer to the student's question is: Neurobiology begins with the identification of particular genes and attempts to understand how those genes work within a cell to affect behavior, while Behavioral genetics begins with behavior and attempts to define the role genes play in producing that behavior. Therefore, the correct option is a) Neurobiology; Behavioral genetics.
In relation to the field of study that focuses on genes and their expression, the correct term is c. Epigenetics. Epigenetics is the study of heritable changes in gene function that do not involve changes in the DNA sequence. It shows evolution at work in real time, influencing both individuals and future generations. Moreover, Behavioral genetics is a field that explores how individual variations arise through the interaction of genes and the environment, often utilizing twin and adoption studies.