U.S. Grade AA. U.S. Grade AA butter conforms to the following: Possesses a fine and highly pleasing butter flavor. May possess a slight feed and a definite cooked flavor. It is made from sweet cream of low natural acid to which a culture (starter) may or may not have been added. The permitted total disratings in body, color, and salt characteristics are limited to one- half (1⁄2).
U.S. Grade A. U.S. Grade A butter conforms to the following: Possesses a pleasing and desirable butter flavor. May possess any of the following flavors to a slight degree: Acid, aged, bitter, coarse, flat, smothered, and storage. May possess feed flavor to a definite degree. The permitted total disratings in body, color, and salt characteristics are limited to one-half (1⁄2), except, when the flavor classification is AA, a disrating total of one (1) is permitted.
U.S. Grade B. U.S. Grade B butter conforms to the following: Possesses a fairly pleasing butter flavor. May possess any of the following flavors to a slight degree: Malty, musty, neutralizer, scorched, utensil, weed, and whey. May possess any of the following flavors to a definite degree: Acid, aged, bitter, smothered, storage, and old cream; feed flavor to a pronounced degree. The permitted total disratings in body, color, and salt characteristics are limited to one-half (1⁄2), except, when the flavor classification is AA, a disrating total of one and one-half (11⁄2) is permitted and when the flavor classification is A, a disrating total on one (1) is permitted
General. Butter of all U.S. grades shall be free of foreign materials and visible mold. Butter possessing a flavor rating of AA and workmanship disratings in excess of one and one-half (11⁄2) shall be given a flavor rating only; butter possessing a flavor rating of A and workmanship disratings in excess of one (1) shall be given a flavor rating only; and butter possessing a flavor rating of B and workmanship disratings in excess of one-half (1⁄2) shall be given a flavor rating
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Here are the four possibilities: AA Aa Aa aa Therefore there is a 25% chance of producing a homozygous dominant offspring (AA).
The genotypic ratio of a cross of Aa and Aa is: one AA, one aa, and two Aa. Or 1:2:1
50% will be tall
F1 offspring obtained by monohybrid cross of AA and AA will be Aa.
From the cross Aa x Aa, the probability of producing a homozygous dominant offspring is 1/4 or (0.25).