Which one of the following crosses will have all the offsprings with recessive phenotype in the F₂ generation?

Step-by-step solution

For all offspring in the F₂ generation to have a recessive phenotype, the initial parents must be homozygous recessive for all the traits. In the cross rryy rryy, both parents are homozygous recessive. They will produce only one type of gamete (ry). The F₁ generation will all have the genotype rryy, which expresses the recessive phenotype. When the F₁ individuals are crossed (rryy rryy) to produce the F₂ generation, all the resulting offspring will again have the genotype rryy. Therefore, all offspring in the F₂ ge