Heredity-related refers to the study of genetics, which is the science of how traits are passed down from one generation to the next. The crossword solution for this term is GENETIC, which is a seven-letter word. Genetics is the study of how characteristics, such as physical traits and diseases, are inherited from parents to their offspring. It is a branch of biology that looks at how genes are passed down from one generation to the next and how they interact with the environment to influence the development of an organism.