Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question
Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation2 Marks
Question
How does a test-cross help in identifying the genotype of the organism? Explain.
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Answer
Cross between an organism with unknown genotype (expressing dominant trait) and an organism with recessive trait (homozygous).
If all offsprings show dominant trait the organism is homozygous (dominant) if half organisms show dominant and half recessive then the organism is heterozygous (dominant).
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