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Biology · PRINCIPLES OF INHERITANCE AND VARIATION
हिन्दीA cross between a true-breeding tall pea plant (\( TT \)) and a true-breeding dwarf pea plant (\( tt \)) yielded \( F_1 \) plants, which were then self-pollinated to produce 1200 \( F_2 \) plants. How many of these \( F_2 \) plants are expected to be heterozygous tall?
Correct answer · Option 2
600
Explanation
In a monohybrid cross \( F_2 \) generation, the genotypic ratio is \( 1/4\,TT : 1/2\,Tt : 1/4\,tt \). Heterozygous tall (\( Tt \)) plants comprise \( 1/2 \) of the total population. Thus, \( 1/2 \times 1200 = 600 \) plants.
