Genetics: Analysis and Principles 4th Edition by Robert Brooker

Exercise 11

In the tomato, red fruit ( R ) is dominant over yellow fruit ( r ), and yellow flowers ( Wf ) are dominant over white flowers ( wf ). A cross was made between true-breeding plants with red fruit and yellow flowers, and plants with yellow fruit and white flowers. The F 1 generation plants were then crossed to plants with yellow fruit and white flowers. The following results were obtained:
333 red fruit, yellow flowers
64 red fruit, white flowers
58 yellow fruit, yellow flowers
350 yellow fruit, white flowers
Calculate the map distance between the two genes.