Question

one plant has the genotype tt. the second plant has the genotype tt. the two plants would

have the same phenotype.

have different phenotypes.

have the same genotype.

have all dominant alleles.

Explanation:

In genetics, the dominant allele (T here) determines the phenotype. A plant with genotype TT is homozygous dominant, and Tt is heterozygous. Since T is dominant, both express the dominant trait, so their phenotypes are the same. The second option is wrong as they have the same phenotype. The third is wrong (genotypes TT and Tt differ). The fourth is wrong (Tt has one recessive allele, not all dominant).

Answer:

A. have the same phenotype.