2. A particular species of pea plant produces either purple or white flowers. A homozygous plant with purple flowers is

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2 A Particular Species Of Pea Plant Produces Either Purple Or White Flowers A Homozygous Plant With Purple Flowers Is 1 (57.63 KiB) Viewed 55 times

2. A particular species of pea plant produces either purple or white flowers. A homozygous plant with purple flowers is crossed with a homozygous plant with white flowers. All F₁ offspring produced purple flowers. The F₁ were self- fertilized, and the following ratios in the F₂ were obtained: 9 purple: 7 white. a. Deduce the genotypes of the parental plants in this cross. (2 marks) b. Outline a possible biochemical pathway to account for the flower colour in this particular plant. (4 marks) 3. A particular plant which produces sickle shaped fruit is crossed with another variety which produces round fruit. All of the F₁ plants bear sickle shaped fruit. Upon self- fertilization of the F₁ plants, the following outcome is observed: 9/16 sickle shaped; 6/16 oblong shaped; 1/16 round fruit. Determine the genotypes of these F2 plants. (6 marks)