Ovules from a pure-breeding green plant are fertilized with pollen from a pure-breeding yellow plant. all of the progeny are green. when the reciprocal cross is performed, all of the progeny are yellow. what do these results suggest?
a) yellow is completely dominant to green.
b) the yellow and green alleles are codominant.
c) color is determined by a sex-linked gene.
d) color is maternally inherited.