The recessive trait phenotype disappears in a one-trait test cross in the F1 generation. This phenotype can reappear in the F2 generation.
F1 Generation
F1 Generation
Crossing from the P1 (parent) will produce the F1 (first generation offspring)
The offspring of the P1 generation are called the F1, or first children of an organism. The offspring of the F1 generation are then called the F2 generation of the original organism.
The F1 generation is created by the mating of the P (parental) generation.
The recessive trait phenotype disappears in a one-trait test cross in the F1 generation. This phenotype can reappear in the F2 generation.
F1 Generation
F1 Generation
Crossing from the P1 (parent) will produce the F1 (first generation offspring)
The offspring of the P1 generation are called the F1, or first children of an organism. The offspring of the F1 generation are then called the F2 generation of the original organism.
The F1 generation consists of the offspring of a cross between two parents; the F2 generation consists of the offspring of a cross between two individuals in the same F1 generation.
Mendel referred to the characteristic expressed in the hybrid F1 generation as the dominant trait. This trait masks the expression of the recessive allele in the heterozygous individual.
The offspring generation.
The phenotypes present in the F1 generation depend on the phenotypes of the parental generation (and the environment). The F1 generation will display the dominant trait(s). For example, if T is tall and t is short, in the cross TT X tt the F1 generation will have the phenotype corresponding to the T allele (tall).
F1 and F2
P represents the parental generation in a genetic cross. F1 represents the offspring of the P generation.