Gregor mendel crossed homozygous tall parts (tt) with homozygous short plants tt what conclusion did mendel draw?

According to this initial single gene autosomal cross, Mendel would have observed that the resulting offspring in the F1 or first filial generation are Tall. This is because, of the allele relationship that he observed, which is simple complete dominance.

The dominant or preferred allele or nucleotide sequence is used for the production of the protein, to allow for the appropriate colour.

Genotype would all be heterozygous Tt.