In Mendel’s experiments, what phenotype was observed in the F1 generation when true-breeding spherical seeds were crossed with true-breeding dented seeds?

In Mendel's experiments, when he crossed true-breeding spherical seeds (dominant trait) with true-breeding dented seeds (recessive trait), the F1 generation exhibited the dominant phenotype, which in this case was spherical seeds. Since true-breeding spherical seeds always produce offspring that exhibit the spherical phenotype, and they possess the dominant allele for that trait, all individuals in the F1 generation expressed the spherical phenotype.

This outcome is consistent with Mendel's principle of dominance, which states that when two homozygous individuals with contrasting traits are crossed, the offspring will display the dominant trait. Therefore, in this particular cross, all the F1 seeds were spherical, showcasing the strength of the dominant trait over the recessive one. This principle underlies many of Mendel's conclusions about inheritance patterns.