In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, then

RRTt x rrttGametes for RRTt is RT and RtGametes for rrtt is rtTherefore, the progenies formed will be having genotypes RrTt (Tall and having red fruit) and Rrtt (Short and having red fruit). Hence, we can say that 50% progenies will be tall and having red fruits.