Tall plants are dominant over short plants. One parent is homozygous dominant and the other is heterozygous for plant height. Which would most likely be the resulting phenotype of the offspring?

Let T represent the dominant tall allele and t the recessive short allele. The homozygous dominant parent is TT, and the heterozygous parent is Tt. Every offspring receives a T allele from the TT parent, so all offspring are tall, even if they receive t from the other parent. The correct choice is “all tall.”

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