Question

In pea plants, the allele for tallness is dominant. What are the possible genotypes of a tall pea plant?

Answer 1

TT and Tt are possible genotypes of a tall pea plant as the resulting phenotype of both possible genotypes result in a tall pea plant.

Answer 2

The correct answer would be TT and Tt.

According to the law of dominance, the trait which gets expressed in the heterozygous condition is termed as dominant trait.

The allele of a gene which is expressed in heterozygous condition is symbolized by capital letter.

For example, the allele responsible for tallness of a plant can be symbolized by "T".

Thus, the genotype of a gene responsible for the tallness of a plant can either be TT (homozygous) or Tt (heterozygous).