Explanation:
Assuming the allele for Red color is R and that for white is r, and that for Tall is T and short is t. Using Mendelian principle of independent assortment, the alleles will combine as shown in the attached Punnet Square;
All the offspring will have the phenotype of Red roses and Tall. The genotype, however, will be RrTT : RrTt in the ratio of 1 : 1
Learn More:
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