You cross two rats from pure breeds: one with grey fur and short tail, the other with white fur and long tail. The F1 pups are grey and long-tailed. In the F2 generation, 40 are grey and long, 9 are white and short, 20 are grey and short, and 11 are white and long. Your null hypothesis is that two loci assort independently. The chi-square value is ________.
A. 6. 5, rejected
B. 0. 5, accepted
C. 6. 5, accepted
D. 3. 5, accepted
E. 0. 05, rejected