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Inheritance and Variation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYInheritance and Variation3 Marks
Question
Define test cross and explain its significance.
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Answer

1. Definition of test cross : A cross between F1 offspring and its homozygous recessive parent is called a test cross.
2. Significance of test cross:
  • Test cross can be used to find out the genotype of any plant which shows dominant characters.
  • Whether the plant is homozygous or heterozygous can be understood by performing test cross.
  • Test cross is used to introduce useful recessive traits in the hybrids of self- pollinated plants.
  • Test cross is quicker method to improve the variety of crop plants and thus it is useful for breeders and geneticists.
  • Test cross can be used for verifying the laws of inheritance.

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