A cross between a tall plant (TT) and a short | vedclass

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(D) In a cross between a homozygous tall plant $(TT)$ and a homozygous short plant $(tt)$,the $F_1$ generation offspring all receive one allele from e

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tallness is the dominant trait

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(D) In a cross between a homozygous tall plant $(TT)$ and a homozygous short plant $(tt)$,the $F_1$ generation offspring all receive one allele from each parent,resulting in a genotype of $(Tt)$.Since the allele for tallness $(T)$ is dominant over the allele for shortness $(t)$,the phenotype of all $F_1$ individuals is tall.Therefore,the observation that all progeny are tall confirms that tallness is the dominant trait.

$A$ cross between a tall plant $(TT)$ and a short pea plant $(tt)$ resulted in progeny that were all tall plants because:

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