Tall corn plants (T)are dominant to dwarf plants (tt). Solid green leaves (G)are dominant to leaves with a white tip (gg). A cross between two corn plants yielded the following phenotypes: 51 tall plants with a white tip on their leaves; 43 dwarf plants with solid leaves; 48 dwarf plants with white tips on their leaves; 45 tall plants with solid leaves. What are the genotypes of the parents that produced these plants?

Question

Quizplus · Accepted Answer

The Punnett square for a cross between TtGg and ttgg will give us the expected phenotypes of the offspring:
 
From this Punnett square, we can see that the expected phenotypes of the offspring match the observed phenotypes given in the problem. Therefore, the parents must be TtGg and ttgg.

Tall Corn Plants (T)are Dominant to Dwarf Plants (Tt)