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Question
- A pure tall plant (TT) is crossed with a pure dwarf plant (tt). Draw Punnett squares to show
- F1, generation
- F2 generation.
- Give the phenotype of F2 generation.
- Give the phenotype and genotypic ratios of the F1 and F2 generations.
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Solution
- In the F2 generation, 75% of the plants will be tall, and 25% will be dwarf.
- F1 generation:
Phenotypic ratio: All tall plants
Genotypic ratio: All hybrids
F2 generation:
Phenotypic ratio: 3 : 1
Genotypic ratio: 1 : 2 : 1
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