To determine the most reasonable prediction about the heights of the three pea plants based on their genotypes, we should first understand the genetics involved.
- The alleles for height are represented by:
- "T" (dominant allele for tall)
- "t" (recessive allele for short)
Based on the provided genotypes:
- Plant A: tt (homozygous recessive) - will be short
- Plant B: TT (homozygous dominant) - will be tall
- Plant C: Tt (heterozygous) - will be tall since the dominant T allele is present
Now we can analyze the predictions:
- Plant C will be the shortest. - This is incorrect because Plant C has at least one dominant T allele.
- Plant B and Plant C will have similar heights. - This is reasonable because both are tall (Plant B is TT and Plant C is Tt).
- Plant A will be the tallest. - This is incorrect because Plant A is tt and will be the shortest.
- Plant A and Plant C will have similar heights. - This is incorrect because Plant A (tt) will be short, while Plant C (Tt) will be tall.
The most reasonable prediction is: Plant B and Plant C will have similar heights.