Phenotype, genotype?

This is something that you need to draw out for yourself to understand, but very simply put, you are crossing a zygous dominant plant with a zygous recessive plant. The resulting phenotype for F1 is TtPp for all offspring (heterozygous, dominant). The genotype is all tall, purple flowering plants (uming no codominance or epistasis). The gametes produced would be dominant features, heterozygous for the recessive traits.