2. which of the following is an example of a polygenic trait?
a. the flower color of a plant is determined by how three different alleles are paired in the plant.
b. a dominant form of gene determines short ear length in an animal while a recessive form determines long ear length
c. spotted wings on a species of awl form as the result of two alleles that are both expressed equally.
d. human height is determined by several genes located on different chromosomes.