Gia and Kojo collect a sample of beetles to calculate the frequency for the W allele. After genotyping the individuals in their sample, they count the following genotypes:
WW: 50
Ww: 170
ww: 120
Gia calculates the frequency by taking: W=68050+50+170
Kojo calculates the frequency by taking: W=50+170+1202(50)+170
Who calculated the frequency incorrectly, and what was their mistake?