Question

A red flower and a white flower can be expressed on a plant, depending on genetics. Which outcome would indicate codominance as the inheritance pattern for flower color in this species?
A All offspring are red.
B All offspring are white.
C All offspring of a red X white cross would be pink.
D All offspring of a red X white cross would be spotted with red and white both being expressed.

Answer 1

D — All offspring of a red × white cross would be spotted with red and white both being expressed.

Reason: In codominance both alleles are fully expressed in the heterozygote, so you see both colors (e.g., red and white patches or spots). Pink (C) describes incomplete dominance (blending), and A/B would indicate one allele is completely dominant.