When gregor mendel crossed a tall plant with a short plant what did the f1 plant inherit?

They inherited a T (tall) allele from the tall parent, and a t (short) allele from the short parent. This is only if we assume that both parents are homozygous, which the short parent would need to be for the short trait to show. If this is true, then the F1 generation would show the tall trait 4/4 times, and would end up with the genotype Tt 4/4 times.