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Which of the following was not observed in F2 progeny of true-breeding tall and dwarf plants?(a) Homozygous tall plants(b) Heterozygous tall plants(c) Homozygous dwarf plants(d) Heterozygous dwarf plantsI had been asked this question in an interview for job.The query is from Inheritance of One Gene-2 topic in section Principles of Inheritance and Variation of Biology – Class 12

Answer»

The CORRECT answer is (d) Heterozygous dwarf plants

For explanation: The F2 progeny has both dwarf and tall plants. 25% of them are homozygous tall, 50% are heterozygous tall, and 25% are homozygous dwarf. Dwarfness is a recessive trait and thus cannot be expressed in the heterozygous state.



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