Test cross involves:

Test cross involves:
  1. crossing between two genotypes with dominant trait
  2. crossing between two genotypes with recessive trait
  3. crossing between two $\mathrm{F}_1$ hybrids
  4. crossing the $\mathrm{F}_1$ hybrid with a double recessive genotype

Solution

Test cross is a cross between an organism with unknown genotype and a recessive parent. It is used to determine whether an individual is homozygous or heterozygous for a trait.

Asked in: NEET 2006

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