1 When a pure tall plant TT is crossed with pure dwarf plant tt all the offsprings in F1 generation are tall. 2 Pure tall plant has both the factors of the same type TT. ... 10 So in F2 generation 75% of plants are tall and 25% of plants are dwarf. Thus the phenotype ratio is 3 : 1.
1 When a pure tall plant TT is crossed with pure dwarf plant tt all the offsprings in F1 generation are tall. 2 Pure tall plant has both the factors of the same type TT. 3 Pure dwarf plant has both the factors of the same type tt. 4 The breed after cross pollination will have one of the factors from pure breed tall TT and one from pure breed dwarf tt. 5 Thus all the plants will have the factor pair Tt. 6 So all the plants are heterozygous tall as T is the dominating factor. 7 On self pollination of these the new breed can have any combination of T and t. 8 It can be TT Tt tT or tt. All of them are equal. 9 But any plant that has a T factor will be tall. 10 So in F2 generation 75% of plants are tall and 25% of plants are dwarf. Thus the phenotype ratio is 3 : 1. 11 Among 75% of tall plants only 25% plants are pure tall TT or homozygous tall remaining 50% plants are heterozygous tall Tt tT. 12 The remaining 25% dwarf plants are pure or homozygous dwarf tt. 13 So the genotype ratio is 1 : 2 : 1.
Explanation:
1 When a pure tall plant TT is crossed with pure dwarf plant tt all the offsprings in F1 generation are tall. 2 Pure tall plant has both the factors of the same type TT. ... 10 So in F2 generation 75% of plants are tall and 25% of plants are dwarf. Thus the phenotype ratio is 3 : 1.
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Answer:
1 When a pure tall plant TT is crossed with pure dwarf plant tt all the offsprings in F1 generation are tall. 2 Pure tall plant has both the factors of the same type TT. ... 10 So in F2 generation 75% of plants are tall and 25% of plants are dwarf. Thus the phenotype ratio is 3 : 1.
Verified answer
Answer:
1 When a pure tall plant TT is crossed with pure dwarf plant tt all the offsprings in F1 generation are tall. 2 Pure tall plant has both the factors of the same type TT. 3 Pure dwarf plant has both the factors of the same type tt. 4 The breed after cross pollination will have one of the factors from pure breed tall TT and one from pure breed dwarf tt. 5 Thus all the plants will have the factor pair Tt. 6 So all the plants are heterozygous tall as T is the dominating factor. 7 On self pollination of these the new breed can have any combination of T and t. 8 It can be TT Tt tT or tt. All of them are equal. 9 But any plant that has a T factor will be tall. 10 So in F2 generation 75% of plants are tall and 25% of plants are dwarf. Thus the phenotype ratio is 3 : 1. 11 Among 75% of tall plants only 25% plants are pure tall TT or homozygous tall remaining 50% plants are heterozygous tall Tt tT. 12 The remaining 25% dwarf plants are pure or homozygous dwarf tt. 13 So the genotype ratio is 1 : 2 : 1.
Explanation:
1 When a pure tall plant TT is crossed with pure dwarf plant tt all the offsprings in F1 generation are tall. 2 Pure tall plant has both the factors of the same type TT. ... 10 So in F2 generation 75% of plants are tall and 25% of plants are dwarf. Thus the phenotype ratio is 3 : 1.
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