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A heterozygous species contain one dominant and one recessive allele. A cross between a purebred tall and short plant will result in 100% tall offspring. Thus, option d is correct.
<h3>What is a genetic cross?</h3>A genetic cross is a representation of the gametes produced by the two parent species that will undergo the process of fertilization to produce offspring. The crosses can include the heterozygous and purebred species.
The TT allele is a purebred allele that codes for tallness, whereas the tt allele is a purebred recessive allele that codes for shortness. The cross between TT and tt is attached to the image below.
From the cross, it can be said that all the offspring produced are heterozygous tall as there are no offspring with purebred dominant and recessive alleles.
Therefore, option D. 100% of offspring are tall.
Learn more about genetic cross here:
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