Farmers Traditionally Kept Some of the Seeds from Their Best

Multiple Choice

Farmers traditionally kept some of the seeds from their best plants in one season to plant the following year. Now that farmers mostly plant hybrid seed this practice is no longer effective because ________.

A) hybrid seed is homozygous, so it is not self-fertile
B) hybrid plants are bred to be incompatible
C) hybrid seeds are heterozygous and not true-breeding
D) hybrid plants are genetically engineered and could be harmful if used for new seed