Summarize: How do genes determine the traits of an organism? Explain in detail.

Why is genetic variation required for evolution of an organism.Explain in detail and with example.

(a) How is the production of the coagulase enzyme in a coagulase test using S. aureus and S. epidermidis related to an organism's pathogenicity? Can coagulase negative organisms be pathogenic? Explain in detail.

(b) What is the appropriate control for the coagulase procedure? Explain in detail.