Question

12) You want to test your hypothesis that the purple and wrinkled genes in corn are linked. You cross a corn plant that breeds true for the dominant traits of purple, wrinkled kernels (PP ss) with a plant breeds true for yellow, smooth kernels (pp SS). You then cross the offspring with a yellow, wrinkled tester and obtain offspring with the phenotypes listed below. In the blank after each phenotype, indicate with an R or a P whether that type is parental or recombinant. 140 purple smooth (0.5 point each; 2 points total) 160 yellow smooth 165 purple wrinkled 135 yellow wrinkled 13) Now carry out a test to test your hypothesis. Fill in the table below (1.5 points) and also the blanks underneath the table. (There is a table of critical values of the 82 distribution below.) Observed (O) Expected (E) [(O-E2/E) Parental Recombinant x2 = El(O-E)2/E) = (1 points) d.f. = (1 point) >P> (1 points) 14) Is your hypothesis supported or rejected? (Highlight one) Supported Rejected (1 points)

Answer 1

12) purple smooth- R

yellow smooth- P

purple wrinkled- P

yellow wrinkled- R