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Question

A yellow seeded plant is crossed with a green seeded plant.

  1. What type of crossis it ?
  2. What type of plants are obtained in F2 generation ? Write the ratio (phenotype).

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Solution

1. This is a monohybrid cross.
2. F2 generation means cross between two heterozygous plants from F1 generation, so, cross between two yellow seeded plants with heterozygous genotype (Yy) will give 3 yellow seeded plants and 1 green seeded plant.
The phenotypic ratio is 3:1
the genotypic ratio is:- 1:2:1 (1 YY, 2 Yy, 1 yy)

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