Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The part of the radish we eat may be oval or long, with long being the dominant trait. If true-breeding red long radishes are crossed with true-breeding white oval radishes, the F1 will be expected to be which of the following?

Question

Quizplus · Accepted Answer

When a red-flowered plant is crossed with a white-flowered plant and yields all-purple offspring, it indicates that the purple flower color is dominant over both red and white. Therefore, the offspring of the cross between true-breeding red long radishes and true-breeding white oval radishes (F1) will have purple flowers. With respect to the radish shape, long is the dominant trait. Thus, the F1 will have long radishes. Therefore, the best choice is D) purple and long.

Radish Flowers May Be Red, Purple, or White