Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation. a. What will be set of genes present in the F1 generation? b. Give reason why only tall plants are observed in F1 progeny. c. When F1 plants were self - pollinated, a total of 800 plants were produced. How many of these would be tall, medium height or short plants? Give the genotype of F 2 generation.
Answers 2
Answer:
There will be 600 tall plants and 200 short plants in the F2 Gen. There will be no medium height plants in F2 Gen. due to the fact that only extreme characters of the pea plants have been chosen...
Genotype for F2 Gen.
TT(1), Tt(2) and tt(1)
So genotypes ratio of F2 Gen = 1:2:1
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Author:
lewiss36a
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Answer:
a) The set of genes present in the F1 generation is T, T, and t, t.
b) F1 progeny are all tall because of the dominance of the dominant Tall (T) gene over the recessive dwarf (tt) gene.
c) When F1 plants were self-pollinated, out of 800, 600 plants would be tall and 200 would be short plants.
d) The genotype of F2 generation- TT:Tt: tt.
Explanation:
- The crossing was done between tall (TT) and short (tt) pea plants.
- The offspring obtained in the F1 generation would be tall (Tt).
- Thus, the set of genes present in the F1 generation is T, t and T, t.
- The T (tall) gene is dominant over the t (short) recessive gene. The reason for the observation of only tall plants in the F1 generation is the law of dominance.
- On self-pollinating the F1 plants, the plants produced would be TT, Tt, and tt.
Tt X Tt
Progeny TT, Tt, tT, and tt
- Out of 800 plants produced, 600 plants would be tall and 200 plants would be short.
- The phenotypic ratio for F1 generation is 3 Tall: 1 short.
- The genotype of F2 generation is TT, Tt, tT, and tt
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Author:
estermoreno
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