Explain how a father and mother who are not colorblind have a son who is colorblind

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?