Question

in the f₂ generation of mendels crosses, all plants had the dominant trait. half of the plants had the dominant allele. all plants had both the dominant and recessive alleles. one in four plants had two alleles for the recessive trait.

Explanation:

Mendel's monohybrid cross results in a 3:1 phenotypic ratio and a 1:2:1 genotypic ratio in the F2 generation. One out of four plants has a homozygous - recessive genotype (two recessive alleles).

Answer:

one in four plants had two alleles for the recessive trait.