A heterozygous pea plant with violet flowers was crossed with a homozygous pea plant with white flowers. Violet is dominant over white. Which one of the following represents the expected combinations among 40 progenies formed?

• A

  All 40 produced violet flowers
• B

  All 40 produced white flowers
• C

  30 produced violet and 10 produced white flowers
• Correct answer
  D

  20 produced violet and 20 produced white flowers

Solution

Genotype of heterozygous violet flower is $\mathrm{V}$ Genotype of homozygous white flower is $v v$
Both white and violet flowers will be produced in equal proportion $(20: 20)$ Out of 40 progenies The expected ratio of violet and white flower plant is $1: 1$.

Hence, the correct answer is option: 'D'.