A new species of plant is discovered in the jungle. Some plants have red berries, but others have purple berries. The two types of plants are crossed. It is noted that all the berries from the plants in the F1 generation are purple, but some of the F2 generation plants have red berries. What is the best explanation for these observations? Purple is the recessive trait.
CHOICES:
a) purple is recessive trait
b) there is evidence of codominance
c) purple is the dominant trait
d) there is evidence of incomplete dominance