Question

A homozygous tall (TT) pea plant looks the same as a heterozygous tall (Tt) pea plant. How can these two plants, which have different genotypes, look the same? (minimum of 2 sentences, including the terms Dominant and Recessive)(4 points)

Answer 1

Both the homozygous tall (TT) and heterozygous tall (Tt) pea plants exhibit the same phenotype, which is the tall appearance, due to the presence of the dominant allele (T). In both cases, the dominant trait for tallness masks the effect of any recessive alleles (t), resulting in no visible differences in their outward characteristics even though their genotypes differ.