A gene showing incomplete dominance

detailed solution

Correct option is A

In incomplete dominance the F1 had a phenotype that did not resemble either of the two parents and was in between the two. The inheritance of flower colour in the dog flower (snapdragon or Antirrhinum sp.) is a good example to understand incomplete dominance. If a red coloued flower is crossed with white colour flowered the F1 generation will have pink coloured flower. Therefore, we can clearly observe that the phenotype was in between the phenotype of the two parents