Question

Choose the correct answer from the alternatives given.

In four o clock plants, the gene for red flower colour (R) is incompletely dominant over the gene for white flower colour (r), hence the plants heterozygous for flower colour (Rr) have pink flowers. What will be the ratio of offsprings in a cross between red flowers and pink flowers?

• A. 75% Red flowers, 25% Pink flowers
• B. All Red flowers
• C. 50% Red flowers, 50% Pink flowers
• D. Red:Pink:White:: 1:2:1

Answer 1

Answer: (C)

50% Red flowers, 50% Pink flowers

Incomplete dominance is reported in flowers of $Mirabills$ $jalapa$ (Four oclock). When red flowers are crossed with pink flowers, 50% red flowers and 50% pink flowers are obtained.