Here we would be using Hardy Weinberg equation for the calculation of allele and genotypic frequencies.
Dwarf genotype frequency = [tex] q^{2} [/tex] = 25% = 0.25
Frequency of allele t = q = [tex] \sqrt{q^{2}} [/tex] = [tex] \sqrt{0.25} [/tex] = 0.5
According to the equation,
p + q = 1
p = 1 - 0.5 = 0.5
Now, the frequency of heterozygous tall plants would be-
2pq = 2 * 0.5 * 0.5 = 0.5 or 50% heterozygous tall plants.
