In a Flowering Plant,gene "A" Encodes an Enzyme Responsible for the Presence

In a flowering plant,gene "A" encodes an enzyme responsible for the presence of dots on the flowers' petals.A₁,A₂,and A₃ are the three known alleles of this gene;A₁ is the wild type,A₂ is a null allele,while A₃ has a mutation in the promoter region of the gene,which results in the synthesis of very little gene product. If the "A" gene is haploinsufficient,what is the predicted phenotypic ratio in the F₁ of a cross between a wild type and a A₂/A₃ heterozygous?

A) 100% of the F₁ plants will have flowers with dots.
B) 25% of the F₁ plants will have flowers with dots,and 75% will have flowers with no dots.
C) 50% of the F₁ plants will have flowers with dots,and 50% will have flowers with no dots.
D) 50% of the F₁ plants will have flowers with a few dots,25% will have flowers with normal amounts of dots,and 25% will have flowers with no dots.
E) 100% of the F₁ plants will have flowers with no dots.