Question

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 plants

I 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 1

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.