Which of the following statements is true?

A Tt plant and a TT plant have the same genotype.

A TT plant and a Tt plant are both tall.

A Tt plant and a tt plant have the same phenotype.

A tt plant is called a hybrid because it has two recessive genes.

Answer:A TT plant and a Tt plant are both tall.

Explanation: If T represents the allele for tall height and t represents the allele for short height, then TT and Tt are both tall.

Normally, every observable trait in living organisms are controlled by at least a pair of gene (allele). The alleles can either be dominant or recessive. A dominant allele has the ability to manifest the observable trait associated with it either in a homozygous or heterozygous state, that is whether the gene contains two identical dominant allele or one dominant allele and one recessive allele. Therefore, T will express itself as tall height whether present as TT or Tt.