Question

a scientist crosses a plant with red flowers and a plant with white flowers. each plant is pure for its flower color. if the gene for flower color shows codominance, what coloring will the flowers on the offspring plants have?
a. pink only
b. white and red
c. white and pink
d. red only

Explanation:

In codominance, both alleles are fully expressed in the phenotype. The red - flowered plant is pure for red (let's say genotype RR) and the white - flowered plant is pure for white (genotype WW). When they are crossed, the offspring will have the genotype RW. In codominance, both the red and white traits are expressed simultaneously, so the flowers of the offspring will show both white and red coloring. Option A is incorrect because pink is a result of incomplete dominance, not codominance. Option C is incorrect as it suggests a mix like in incomplete dominance. Option D is incorrect as it only shows one trait.

Answer:

B. White and red