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NEETZoologyPrinciples of Inheritance and Variation

What are the possible genotypes of the resultant zygotes from random fertilisation in the F1 generation?

Options

  1. ATT, Tt, tt
  2. BTT, tt
  3. CTt only
  4. DTT only

Correct answer

A. TT, Tt, tt

Step-by-step solution

When fertilisation takes place, the pollen grains of genotype T have a 50 per cent chance to pollinate eggs of the genotype T, as well as of genotype t. Also pollen grains of genotype t have a 50 per cent chance of pollinating eggs of genotype T, as well as of genotype t. As a result of random fertilisation, the resultant zygotes can be of the genotypes TT, Tt or tt.

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