Question

What is f1 and f2 prognenecy
What is f1 f2 prognency

Answer 1

An F1 Hybrid (also known as filial 1 hybrid) is the first filial generation of offspring of distinctly different parental types. F1 hybrids are used in genetics, and in selective breeding, where it may appear as F1 crossbreed. The term is sometimes written with a subscript, as F1 hybrid.

Answer 2

F1 generation is first filial generation. when parents i.e. male and female reproduce, their offsprings i.e. child is the F1 generation.
whereas
F2 generation is second filial generation. when
offsprings reproduce with each other , their offsprings is called the F2 generation.