For many chemical reactions, the actual yield is usually less than the theoretical yield. This is due to possible loss in the process or inefficiency of the chemical reaction.
Theoretical yield is obtained from stoichiometry calculation of a balanced equation. Actual yield is the amount of product formed from a reaction. Percentage yield is the ratio of actual yield to the theoretical yield of a product. Percentage yield is never 100 % or greater than 100%. Therefore, Actual yield of a product always less than the theoretical yield.
Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent.
