Inheritance and Variation — BIOLOGY STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYInheritance and Variation5 Marks
Question
Long Answer Questions
Define test cross and explain its significance.
✓
Answer
1. Definition of test cross : A cross between $F_1$ 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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