The combination of corn that must be refined to get the highest genotype variety in the next generation is Bb x Bb
Yellow is the dominant color which is denoted by an uppercase letter with genotype B. And yellow is the recessive color which is denoted by a lowercase letter with genotype b. If farmers are increasing the color diversity of corn seeds, the phenotypes that must be produced must be more yellow than white.
Of the possible crosses above, the phenotype that produces more yellow is the genotype Bb x Bb cross.
Learn more about possible crosses Bb x Bb at https://brainly.com/question/28294656
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