Multiple choice A cross between F1 hybrid and a recessive parent gives the ratio of 3:1 2:1 1:1 9:1 Reveal answer Fill a bubble to check yourself C Correct answer Explanation A cross between an F1 hybrid (Tt) and a recessive parent (tt) is a test cross. The resulting offspring will be 50% Tt and 50% tt, yielding a 1:1 phenotypic ratio.