In genetics, alleles are different forms of a gene that can exist at a particular locus on a chromosome. An organism inherits one allele from each parent, which can be dominant or recessive. For instance, in pea plants, the allele for tall plants (T) is dominant over the allele for short plants (t). If a pea plant has the genotype Tt, where 'T' is the tall allele and 't' is the short allele, what will be the appearance of the plant in terms of height?