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Question

Given below is a schematic diagram showing Mendel's Experiment on sweet pea plants having axial flowers with round seeds (AARR) and Terminal flowers with wrinkled seeds, (aarr) Study the same and answer the question that follows.

Give the phenotypic ratio of F2 progeny.


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Solution

F2 progeny:

The phenotypes of F2 progeny produced by the self-pollination of F1 progeny are shown below.

  1. Plants with round seeds and axial flowers.
  2. Plants with wrinkled seeds and axial flowers.
  3. Plants with wrinkled round seeds and terminal flowers.
  4. Plants with wrinkled seeds and terminal flowers.

The phenotype of F2 progeny: 9 : 3 : 3: 1 corresponds to Axial round: Axial wrinkled: Terminal round: Terminal wrinkled.

The phenotype of F2 progeny: 9 : 3 : 3 : 1.


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