The parental line homozygous for GFP2 fluoresces, and the fluorescence occurs in the roots of the plant.
In the given scenario, there are two parental lines with different GFP (Green Fluorescent Protein) variants, namely GFP1 and GFP2. The experimental objective is to determine which parental line exhibits fluorescence and, if so, in which part of the plant.
Upon checking both parental lines, it is found that the line homozygous for GFP2 displays fluorescence. This indicates that the GFP2 variant is capable of emitting green fluorescence. Moreover, the fluorescence is observed specifically in the roots of the plant. The expression of GFP2 in the roots results in the emission of green light, providing a visual indicator of the presence of this particular GFP variant in that specific plant tissue. This information is valuable for understanding the genetic expression and distribution of the GFP variants within the plant.