Question

In a cross between a pea plant with purple flowers (PP) and a pea plant with white flowers (pp), the phenotypic ratio would be

• A. All white
• B. All purple
• C. Half purple, half white
• D. 1PP, 2Pp, 1pp
• E. All Pp

Answer 1

The correct option is B All purple

Since allele for the purple flower is dominant over the allele for white flowers, a cross between pure breeding purple (PP) and white flowered (pp) varieties will give all purple flowered (Pp) progeny. The presence of allele for the white flower is masked by allele for purple color and no white flowered progeny is produced in F${}_1$ generation. Thus, the correct answer is B.