CELL DIVISION
MEIOSIS AND GENETIC VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2 TT:2 Tt:0 tt
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1 TT:2 Tt:1 tt
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2 TT:1 Tt:1 tt
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0 TT:0 Tt:4 tt
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Detailed explanation-1: -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.
Detailed explanation-2: -Answer and Explanation: The phenotypic characteristics of offsprings are that all the plants will be tall plants. TT is a tall plant. Tt will also be a tall plant.
Detailed explanation-3: -Pea plants are tall if they have the genotype TT or Tt, and they are short if they have genotype tt.
Detailed explanation-4: -When the F1 generation is self-crossed (Tt), then in the F2 generation, the progeny produced will be tall homozygous (TT), Tall heterozygous (Tt), and dwarf homozygous in the ratio of 1:2:1.
Detailed explanation-5: -So, the correct option is ‘50%’.