in a cross between true breeding tall plants and with true breeding short plants all of the F1 are tall.when these plants are allowed to fertilized themselves,the F2 plants are occure in a ratio of 3tall to1short. which of the following is not valid:

a)the difference between tall and short stature in these line is controlled by a single gene pair.

b)during production of gametes in F1 plants, the tall and short alleles segregate from eachother equallyinto the gametes

c) the tall and short assort independentedly from eachother

d)fertilization occure randomly between gametes carrying tall and short alleles