Does a constructive amendment occur when the government substitutes Congress's intended object of the actus reus of 18 U.S.C. § 2422(b), 'any individual who has not attained the age of eighteen years' with its opposite, an adult?

QUESTION(S) PRESENTED : I. Does a constructive amendment occur when the government substitutes Congress's intended object of the actus reus of 18 U.S.C. § 2422(b), “any individual who has not attained the age of eighteen years" with its opposite, an adult? II. When a trial court finds sufficient evidence of inducement to permit an entrapment defense, is it prosecutorial misconduct for the government to relieve themselves of the burden of proving predisposition by repeatedly telling the jury that it is unnecessary for the government to prove the essential element? ; : . ii.