Question

Incomplete dominance was discovered in

• A. Antirrhinum majus
• B. Mirabilis jalapa
• C. Pisum sativum
• D. Both A and B
  

Answer 1

The correct option is B Mirabilis jalapa

Incomplete dominance is the condition when the dominant allele is not able to mask the effect of recessive allele completely. This results in an organism showing a physical appearance with a blend of both the alleles. It is also called partial dominance.

It was first discovered in Mirabilis jalapa or four o' clock plant. Red-flowered plants are dominant over white-flowered plants. F${}_1$ generation produced is all pink (Rr), where the red allele is not able to suppress the effect of white allele completely resulting in a new combination i.e. pink.

So, the correct option is 'Mirabilis jalapa'.