Difficulty: Medium
Average Score: 78%
Entry Exam
Passage / Scenario
In a specific scenario, red flowers are dominant over white flowers. A plant heterozygous for red flowers and a plant with white flowers are crossed. What is the expected proportion of phenotypes in the next generation?
Correct answer
A
Rationale
When a plant heterozygous for red flowers (Rr) is crossed with a plant having white flowers (rr), according to Mendelian genetics, the Punnett square predicts a 1:1 ratio of red (Rr) to white (rr) flowers in the offspring. This means that the expected proportion in the next generation would be 2 red flowers and 2 white flowers.