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ExamsNEETBiology

The genotype of a plant showing the dominant phenotype can be determined by:

  1. test cross
  2. dihybrid cross
  3. pedigree analysis
  4. back cross

Correct answer: test cross

Solution

A dominant phenotype can come from either homozygous dominant or heterozygous genotype, so its genotype is not directly known. A test cross with a recessive homozygote exposes the hidden allele combination through the offspring ratios.

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