Question
Define and design a test-cross.
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Answer
→ A cross between a plant with known genotype and the recessive parent is called as a test cross.
→ A test cross is used to determine the genotype of the unknown plant. (i.e. whether the plant is homozygous 1:1 ratio of Dominant: Recessive, then the unkown plant is heterozygous.
→ However, if the progeny are all dominant, then the unknown plant is homozygous.
→ A test cross is used to determine the genotype of the unknown plant. (i.e. whether the plant is homozygous 1:1 ratio of Dominant: Recessive, then the unkown plant is heterozygous.
→ However, if the progeny are all dominant, then the unknown plant is homozygous.
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