A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?

Tt and Tt are the genotype of both the parents.

Tall plants can have the genotype as TT or Tt while dwarf plants can have the genotype as tt only.

In 1^st case where the parents are having genotype as TT and Tt

All plant progeny are tall.

Therefore 1^st case is not the answer as it does not generate any dwarf plants.

In 2^nd case where the parents are having genotype as Tt and Tt

3/4^th of the F₂ plants are tall and 1/4^th of the F₂plants are dwarf.

Therefore 2^nd case is the answer as 1/4^th of the progeny are dwarf when two tall plants are crossed.

In 3^rd case where the parents are having genotype as TT and TT

All the progeny are tall.

Therefore 3^rdcase is not the answer as the cross does not generate any dwarf plants.

In the 4^th casewhere plants are having genotype as Tt and tt ; one of them has the phenotype to be dwarf . But according to the question the cross is done between two tall plants , hence the given case is not the answer.