The study of how traits are passed from parent to offspring. A.
Inheritance
B.
Gene Expression
C.
Translation
D.
Genetics

Genetics

Explanation:

Genetics is the study of how traits are passed down to generations, like from parent to offspring.

Gregor Mendel is known as the father of genetics and was one of the first to study how traits were passed down across generations.

So, D is the correct answer.