Corncob, biokit

Mendel's rules at your fingertips. Groups of students work out Mendel's rules. The grains of the different crosses are counted, calculated on worksheets and compared. Contents: 2 cobs of purebred corn, 1 cob F1 hybrid, 3 cobs each F2 3:1, backcross 1:1, 3 each dihybrid cobs purple:yellow:smooth:wrinkled 9:3:3:1 and 1:1:1:1, 15 cobs in all, photocopies, instructions In sturdy case, 31 x 28 cm