The ADH gene also has two primary alleles. One allele, A, codes for a form of the ADH enzyme that catalyzes the conversion of alcohol into acetaldehyde approximately 80 times faster than the form encoded by the a allele. AA individuals exhibit fast conversion, Aa individuals exhibit medium conversion, and aa individuals exhibit slow conversion of alcohol into acetaldehyde. In this question, we are interested in "conversion rate" as a trait. The possible phenotypes are fast, medium, and slow.
a. Does the ADH gene exhibit dominance, incomplete dominance, or codominance with respect to the alcohol conversion rate? Explain your answer.
b. Jasmine and Jake both exhibit a medium rate of conversion of alcohol into acetaldehyde. What proportion of their kids are expected to exhibit fast conversion, medium conversion, or slow conversion of alcohol? Show your work with a Punnett square and explain.