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A pea plant showing a dominant phenotype (e.g., tall) could have which possible genotype(s)?

Question
A pea plant showing a dominant phenotype (e.g., tall) could have which possible genotype(s)?
Only the homozygous dominant genotype
Either the homozygous dominant or heterozygous genotype
Only the homozygous recessive genotype
No genotype can produce a dominant phenotype
Answer
Either the homozygous dominant or heterozygous genotype
Detailed Explanation
A tall (dominant) phenotype could result from either TT (homozygous dominant) or Tt (heterozygous) genotypes.
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