Question

If a pea plant shows a recessive phenotype:

Options

• it can be either TT or Tt

• it can be either Tt or tt

• it can be only TT

• it can be only tt

Answer 1

it can be only tt

Explanation:

A recessive phenotype in pea plants appears only when the plant is homozygous recessive (tt). This means both alleles must be the recessive form for the recessive trait to be expressed. If the plant had the genotype TT (homozygous dominant) or Tt (heterozygous), the dominant trait would be expressed, masking the recessive trait. Thus, a plant showing a recessive phenotype can only have the genotype tt.