Question
A botanist has acquired a group of pea plants. All of the plants have yellow pea pods (the recessive trait), except for one plant with green pea pods (the dominant trait). Pea pod color is caused by a single gene.How could the botanist best determine whether the genotype of the green-pod plant is homozygous or heterozygous?- Cross the green-pod plant with a yellow-pod plant.- Cross the green-pod plant with another green-pod plant.- Self-pollinate the green-pod plant.
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Evidence boundary
The predicted outcomes assume one gene, complete dominance, equal allele segregation, random fertilization, and no genotype-dependent survival. A yellow-pod offspring establishes heterozygosity under this model; a finite all-green sample does not prove homozygous dominance with certainty.