You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. all of the f1 are pink. what can you say about the alleles for the parental traits? you cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. all of the f1 are pink. what can you say about the alleles for the parental traits? both red and white are recessive. red is dominant. red and white show incomplete dominance. pink is dominant, whereas red and white are recessive.