Radish flowers may be red, purple, or white. The part of the radish we eat may be oval or long. A cross between a red-flowered long radish plant and a white-flowered oval radish plant yields all-purple long radish offspring. Then the F1 are crossed. In the resulting F2 generation, which of the following phenotypic ratios would be expected?

Question

Quizplus · Accepted Answer

The F1 generation shows a uniform phenotype of purple flowers and long radishes, indicating that these traits are dominant and the parents were homozygous for each trait (red/white and long/oval). The F2 generation, resulting from F1 crosses, would display a variety of combinations of these traits. The given ratio of 6:3:3:2:1:1 suggests a dihybrid cross with incomplete dominance for the flower color (purple as a result of red and white) and complete dominance for the radish shape, leading to a more complex assortment of phenotypes than the simple 9:3:3:1 Mendelian ratio.

Radish Flowers May Be Red, Purple, or White