Question

Two different strains K and L of a particular weed demonstrate differential resistance to herbicides A and B. Strain K cannot photosynthesize (and, thus, perishes) during contact with herbicide B, but is resistant to getting sprayed with A, whereas L dies when sprayed with A, but not with B. From a cross between two weeds, all progeny in F1 were resistant to both herbicides. In F2, 179 plants were resistant to both weed killers, 61 were resistant to B only, 22 were sensitive to both herbicides, and 60 were resistant only to A. What is the mode of inheritance of herbicide resistance?

Answer 1