The scientist can conclude that the plants in the P generation were not true-breeding.
A heterozygous organism is an individual that carries different alleles for a given gene locus.
In a cross of a dominant phenotypic trait, the presence of both traits in the F1 generation is evidence that parents were heterozygous.
In conclusion, the scientist can conclude that the plants in the P generation were not true-breeding.
Learn more about heterozygous organisms here:
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