SCIENCE
GENETIC AND MENDELS LAW OF HEREDITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When tall Red plant is crossed with dwarf white plant, the F2 generation tall red and dwarf white will occur in the ratio of.
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3:1
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9:1
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3:3
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1:9
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Explanation:
Detailed explanation-1: -So, the correct option is ‘1:1:1:1’. Was this answer helpful?
Detailed explanation-2: -F1 Generation consists of only tall plants, while F2 generation has both tall and dwarf in the ratio of 3:1.
Detailed explanation-3: -When a tall and red-flowered plant is crossed with a dwarf and white-flowered plant, the phenotype in the progeny is dwarf and white.
Detailed explanation-4: -But when F1 generation plants were self-fertilized, it was found that some plants were dwarf (25%) some were tall (75%) in F2 generation.
Detailed explanation-5: -F2 Genotypic ratio =1 pure tall (TT) : 2 heterozygous tall (Tt) : 1 pure dwarf (tt); thus, the ratio of pure tall to pure short plants will be 1:1.
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