Question

which describes the notation tt for the trait of plant height?
homozygous genotype
heterozygous genotype
homozygous phenotype
heterozygous phenotype

Explanation:

• Genotype vs Phenotype: Genotype refers to the genetic makeup (\(Tt\) is a genetic combination), while phenotype is the observable trait (like tall or short plant height). So options with "phenotype" can be eliminated.
• Homozygous vs Heterozygous: Homozygous means having two identical alleles (e.g., \(TT\) or \(tt\)). Heterozygous means having two different alleles. Since \(Tt\) has two different alleles (\(T\) and \(t\)), it is heterozygous.

Answer:

heterozygous genotype