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NEETZoologyPrinciples of Inheritance and Variation

What method did Mendel use to determine the genotype of a tall plant at F2?

Options

  1. ASelf-crossing the plant
  2. BCrossing the plant with another tall plant
  3. CCrossing the tall plant with a dwarf plant
  4. DUsing mathematical probability

Correct answer

C. Crossing the tall plant with a dwarf plant

Step-by-step solution

From the preceeding paragraphs it is clear that though the genotypic ratios can be calculated using mathematical probability, by simply looking at the phenotype of a dominant trait, it is not possible to know the genotypic composition. That is, for example, whether a tall plant from F1 or F2 has TT or Tt composition, cannot be predicted. Therefore, to determine the genotype of a tall plant at F2 , Mendel crossed the tall plant from F2 with a dwarf plant . This he called a test cross. In a typical test cross an orga

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