If a charctreistic of a parent such as eye color does not show up in offspring is it gone forever?

How do accessory pigments chlorophyll?

What is the next step in the process after a substrate enters the active site of an enzyme

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?