14.41 Flower Colour and Shape A botanist per- forms a secondary cross of petunias involving indepen- dent factors that control leaf shape and flower colour, where the factor A represents red colour, a represents white colour, B represents round leaves, and b repre- sents long leaves. According to the Mendelian model, the plants should exhibit the characteristics AB, Ab, aB, and ab in the ratio 9:3:3:1. Of 160 experimental plants, the following numbers were observed:

Is there sufficient evidence to refute the Mendelian model at the a = 0.01 level?

AB Ab aB 95 30 30 ab 28 7