An F 1 hybrid of two inbred corn lines was produced and then selfed to produce an F 2 . F 1 and F 2 seed were planted in a randomized design in two...

  F1 F2   F1 F2

Mean   95 80   94 75Variance  20 60   80 120

a. What proportion of the F2 phenotypic variance in each field is due to genotypic variance?

b. What is the broad sense heritability of yield in each field?

c. Why do you think that the estimates of heritability differ between the fields