A plant with the genotype TT is called Homozygous
Step-by-step explanation:
A plant or an organism with the same alleles (traits) for a gene is called as homozygous.
Plant with dominant alleles (2 copies of the same allele) will be referred to as Dominant homozygous. The dominant allele is always shown in capital letters. An organism can be homozygous for both dominant and recessive traits.
Example of homozygous are the seed shape of pea plants. R for round shape and r for wrinkled seed. The alleles would have genotype Rr, RR, rr, in which RR, rr are homozygous dominant and recessive respectively.