A cross was carried out between a purebred purple color flower plant denoted by PP and a
pure bred white color flower plant denoted by pp to obtain F1 progeny. Later the F1 progeny
was selfed to obtain F2 progeny. Answer the following questions:
a. State the color of flower and genotype you would expect in their F1 progeny.
b. What must be the percentage of purple flowers and white flowers in the F2 generation.
c. What is this cross called? State the expected genotypic ratio of BB and bb in F2
generation? Which one is the dominant trait and which one is the recessive trait?
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a.Thus, blue coloured flowers are expected in F1 generation.
(2) If the plants obtained in the F1 generation are self pollinated (Bb x Bb), it will result in 25% of the progeny as white flowers, since 25% of the offspring will have a homozygous recessive gene (bb).
b.The F2 generation results from self-pollination of F1 plants, and contained 75% purple flowers and 25% white flowers. This type of experiment is known as a monohybrid cross.
c. expected ratio of genotypes BB - 1/4 (25%) and Bb - 2/4 (50%) in F2 generation.
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