F2 Genotypic Ratio in Dihybrid Cross — NEET Biology
📚 Practice Concept📖 NCERT Source
Can you, using the Punnett square data work out the genotypic ratio at the F2 stage and fill in the format given? Is the genotypic ratio also 9:3:3:1?
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QuestionPractice Question
Which of the following statements are true regarding the Punnett square shown in the figure? I. F₁ plants are heterozygous tall II. Selfing of F₁ gives both homozygous and heterozygous offspring III. Phenotypic ratio is 3 tall : 1 dwarf IV. Genotypic ratio is 2 TT : 1 tt : 1 Tt
📖 Solution & NCERT Explanation
View solution & NCERT explanation
Correct answer: A — I, II, III only
IV is incorrect – the correct genotypic ratio is 1 TT : 2 Tt : 1 tt.
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Can you, using the Punnett square data work out the genotypic ratio at the F2 stage and fill in the format given? Is the genotypic ratio also 9:3:3:1?
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Which chapter is this from?
Principles of Inheritance and Variation, Class 12 NCERT Biology.
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