Answer:
All members of the F1 generation had the Purple phenotype because their genotype was Pp at the flower locus.
Explanation:
Monohybrid cross is a cross involving one trait(for example Flower color).
When Mendel crossed true breeding pea plants that differed in flower color ie Purple flowered pea plant(PP) is crossed with White flowered pea plant(pp),all the seeds of F1 generation were purple.
The white flower trait did not appear in the F1 generation because the purple flower trait completely masked the white flower trait . Thus ,Purple flower trait (PP) is dominant over white flower trait(pp).
So,although the genotype of F1 seeds is Pp,the phenotype is purple flower color because the allele" P" is completely dominant over the allele "p".
