What is the expected ratio of genotypes in the F2 generation (allowing the F1 hybrids from the first question to self-fertilize)?

Question

What is the expected ratio of genotypes in the F2 generation (allowing the F1 hybrids from the first question to self-fertilize)?

A. all Pp

B. 1 PP : 2 Pp : 1 pp

C. 3 PP : 1 pp

D. 3 PP : 1 Pp

Answer 1

If what you are saying is your F1 generation or parent generation is genotypically hybrid meaning 1 dominant allele P, and one recessive allele, p. It would look like this:. Pp, Pp.

When F1 crossed: Pp x Pp,. They would produce or have an F2 with the following genotype: 1PP, 2Pp, 1pp 1 homozygous dominant PP, 2 heterozygous dominant, and 1 homozygous recessive. So B would be the correct answer for this scenario if what you are saying is that the F1 generation is Pp hybrid and both parents have this genotype.

Answer 2

I think this question is a follow up to another one which involves a cross between PP and pp plants. That first cross would produce plants that are all Pp. If those Pp plants were then crossed as an F2, then the ratio would be 1:2:1

1 PP : 2 Pp : 1 pp

____P____p

P___PP__Pp

p___Pp__pp