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NEET2007ZoologyPrinciples of Inheritance and VariationActual

A common test to find the genotype of a hybrid is by:

Options

  1. Acrossing of one F₂ progeny with female parent
  2. Bstudying the sexual behaviour of F ₁ progenies
  3. Ccrossing of one F₁ progeny with male parent
  4. Dcrossing of one F ₂ progeny with male parent.

Correct answer

C. crossing of one F₁ progeny with male parent

Step-by-step solution

A common test to find the genotype of a hybrid is a test cross. Here, F ₁ hybrids are crossed with the recessive parent. Phenotypic ratios of 1: 1 confirm that the F ₁ hybrid is heterozygous. Related Theory Caution This is a misleading question. Students consider the question as wrong, as they miss the word recessive parent. However, they do not realise that test cross is cross between F_J , hybrid progeny with recessive parent, and F_s is only present in option ( C ) .

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