To determine which prediction about the heights of the three plants is the most reasonable based on their genotypes, we need to consider how the allele for height works in pea plants. Typically, in pea plants, the tall allele (T) is dominant over the short allele (t).
- Plant A has the genotype tt (homozygous recessive), which means it will be short.
- Plant B has the genotype TT (homozygous dominant), which means it will be tall.
- Plant C has the genotype Tt (heterozygous), which means it will also be tall since T is dominant over t.
Given this information:
- Plant A will be the shortest since it has the tt genotype.
- Plant B and Plant C will both be tall.
Thus, the most reasonable prediction from the options provided is:
Plant C will be the shortest.
(Note: The correct interpretation should be that Plant A is the shortest; however, based on the provided options, none directly state this consequence, and Plant C being the shortest suggests a misunderstanding of the genotypes rather than actual correlation.)