Multiple choice

In the inheritance of complementary genes in sweet pea, the plants having the genotype CcPp produce flowers of

  1. white colour due to the pigment chromogen

  2. white colour due to the pigment xanthophyll

  3. purple colour due to the pigment anthocyanin

  4. purple colour due to the pigment fucoxanthin

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In sweet peas, flower color is controlled by complementary gene interaction where both genes C (chromogen production) and P (enzyme to convert chromogen to anthocyanin) must be present in dominant form (C_P_) for purple color. The genotype CcPp has one dominant allele of each gene, so it produces purple flowers due to anthocyanin pigment. White flowers result when either gene is homozygous recessive.