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 dominant. If true breeding red, long radishes are crossed with true breeding white, oval radishes, what will the offspring look like?

The offspring will be purple and long

Explanation:

Radish flowers = Red, purple, or yellow

For a cross between a red-flowered plant and a white-flowered plant to yield all-purple offspring, that means either the red or white is dominant and the other recessive.

When cross it will result in 16 progenies.

There is an attachment to this answer to further clarify the answer.