Identify the incorrect statement regarding incomplete dominance.

• A

  The genotypic ratio of the ${\mathrm{F}}_2$ generation is identical to that of Mendel’s monohybrid cross.

• B

  It is observed with respect to inheritance of flower colour in Snapdragon.

• C

  As neither allele is dominant, in the ${\mathrm{F}}_2$ generation the phenotypic ratio is identical to the genotypic ratio.

• D

  In this case, there is joint expression of both alleles in a heterozygote.