Explain the Incomplete Dominance with example.

Explanation

Incomplete dominance : It is the phenomenon in which neither of the genes is completely dominant or completely recessive. As a result the hybrid shows intermediate character, for example the inheritance of flower colour in the dog flower (Snapdragon or Antirrhinum sp). The cross between true breeding (homozygous) red flower (RR) and true breeding (homozygous) white flower plant (rr) `F_(1)` (Rr) was pink.

The phenotypic ratio deviates from Mendelian monohybrid ratio of 3 : 1 to 1 : 2 : 1 (Red flower -1, Pink flower -2, White flower -1) since the heterozygous/hybrid shows a different phenotype genotype ratio remains the same as Mendelian ratio 1 : 2 : 1.