Be prepared for some questions you may be unable to answer. The relationship between DNA and genetics was not confirmed until 1944. Watson and Crick did not publish their delineation of the structure of the DNA molecule until 1953. Some of the students may have heard about sex-influenced traits. Lewis does not cover this topic.
Sex influenced traits are autosomal but are influenced by the sex chromosomes.
The classic example of a sex-influenced trait is male pattern baldness. The gene for this trait is not on either of the sex chromosomes, but the action of the sex chromosomes influences the expression of the trait. This could be termed a type of epistasis. Male pattern baldness is dominant in the male and recessive in the female. If you use this example, be certain the students realize that the gene for male pattern baldness does not code for complete baldness, nor is it the only cause of baldness.