To determine which plant is likely to be the tallest, we need to consider the genotypes of each plant in relation to the dominant and recessive alleles for height.
- Plant A has the genotype tt, which is homozygous recessive and typically results in shorter plants.
- Plant B has the genotype TT, which is homozygous dominant and generally leads to the tallest plants.
- Plant C has the genotype Tt, which is heterozygous and will also usually be tall, but not as tall as Plant B.
Based on this information:
- Plant A will be the shortest due to being tt.
- Plant B will be the tallest due to being TT.
- Plant C will have a height that is similar to Plant B but not as tall.
Considering the response options, the most reasonable prediction is that Plant B and Plant C will have similar heights (though Plant B will be taller). However, the phrasing of the answer suggests we are focusing on their relative heights, and both are likely taller than Plant A.
So, the best answer is:
Plant B and Plant C will have similar heights.