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BotanyNEET 2024Mendel's laws and deviations

Principles of Inheritance and Variation

In a plant, black seed colour (BB/Bb) is dominant over white seed colour (bb). In order to find out the genotype of a black-seeded plant, with which of the following genotypes will you cross it?

  1. A.bb
  2. B.Bb
  3. C.BB/Bb
  4. D.BB

Solution

To reveal a dominant plant's genotype, cross it with the homozygous recessive (bb) — a test cross. Any white-seeded progeny proves the parent is Bb.

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