crossing red flower snapdragons with white lowering snapdragons yields seeds that grow into...?

Incomplete dominance. You see a "mixing" of phenotypes. Since all the offspring are of the same phenotype, that suggests that both parents are homozygous for different traits. If one was dominant over the other, then you would see the dominant phenotype. Since a new phenotype that emerged that was "mixing" rather than "both" (pink flowers rather than something like red petals with white spots), you have incomplete dominance. (The red petals with white spots situation would be co-dominance)

If the trait became codominant, dissimilar the flora (on the comparable plant) could be purple and a few could be white. This trait shows INCOMPLETE DOMINANCE. In codominance, the two are expressed the two, yet that's no longer the case in this situation. The alleles for flower colour are the two expressed to a pair diploma, ensuing in a mix of the dominant and recessive phenotypes. In snapdragons, the R allele codes for some purple pigment, yet no longer adequate to make the flower deep purple by skill of itself. organic white snapdragons have 2 white R'R' alleles. Heterozygous snapdragons have one purple (R) and one white (R') allele. They has a purple phenotype using fact the only R allele on my own can't make adequate pigment for organic purple colour.