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).
Mendel observed phenotypes for seven contrasting characters segregating in to three is to one ratio mathematically and thus he propounded the principle dominance and recessive characters
When Mendel crossed purebred tall-stemmed plants the first generation
offspring all had tall stems
the ratio of phenotypes was 3:1, so two phenotypes. three purple and one white
F2 Generation
The recessive trait phenotype disappears in a one-trait test cross in the F1 generation. This phenotype can reappear in the F2 generation.
F2 generation
F2 generation
For monohybrid cross the genotype ratio in f2 generation would be 1:2:1 and phenotype ratio would be 3: 1
3:1(Apex)
They differed both in genotype and phenotype. Mendel's F1 generation were all heterozygous Tall. Where his F2 generation had genotype frequencies as follows: 1TT:2Tt:1tt and the phenotype frequency 3tall:1short This is assuming you are referring to his experiments using height as the factor. His other experiments had similar results just replace all the uppercase T's with the dominant allele and the lowercase t's with the recessive trait.
9:3:3:1 was the ratio of Mendel's f2 generation for the two factor cross.
F2 Generation
F2 generation (second filial generation)
No genes disappear in the F1 generation. Each of the F1 plants was heterozygous, having both a dominant and recessive alleles. The recessive phenotype disappears in the F1 generation because all members of that generation carry a dominant allele. In the F2 generation, the recessive phenotype will reappear.
f2 generation
F2 generation
F2 generation
F2 generation
The recessive trait phenotype disappears in a one-trait test cross in the F1 generation. This phenotype can reappear in the F2 generation.
For monohybrid cross the genotype ratio in f2 generation would be 1:2:1 and phenotype ratio would be 3: 1