The study of genes is called genetics.
The correct answer to the question is option D that is They reproduce and have many traits that are easy to observe.
What are genes?
- The genes are defined as the molecules which make the DNA and store all the genetic information of the human being and help from the protein and enzyme as per requirement.
Mendel is the forefather of genetics and he used the pea plant to perform his experiment due to the various characteristics of the pea plant and can be seen easily.
Hence, the correct option is option D
For more information about genetics, refer to the link:-
https://brainly.com/question/8832859
