Question

a cross was carried out between a pure bred tall pea plant and a pure bred dwarf pea plant and F1 progeny was obtained Later the F1 progeny was selfed to obtain F2 progeny

Answer 1

In parent generation there were tall(TT) and dwarf(tt) pea plants which were cross pollinated to get F1 generation. In F1 generation, all plants were tall and no dwarf plant were obtained. It means that T is dominant over t. Though the dwarfness trait was inherited it was not expressed.
In F2 generation one quarter of pea plants were dwarf with genotypic ratio 1:2:1 and phenotypic ratio 3:1.

Answer 2

Answer: here is the answer, hope it helps you☺️☺️

Explanation:

(a) The phenotype of F1 progeny is Tt because F1 or hybrid plants were not intermediate between the two alternate forms of a character. They resembled only one parent. In a cross between tall and dwarf of pea plants, the F1 plants were all tall.

(b) The phenotypic ratio of F2 progeny is 3: 1.

(c) F1 progeny resembled only one parent which is dominant in nature but in F2 progeny phenotypically three plants are tall and one plant is dwarf. But according to genotype ratio, one plant is pure tall, two are hybrid tall and one plant is a pure dwarf.