Answer:
50%
Step-by-step explanation:
Genotypes T1T1, T1T2, and T1T3 all have the "T1" allele with 50, 60, and 40 individuals respectively.
add all the genotypes with the T1 allele and divide it by the total number of individuals.
(50+60+40)/(50+60+40+50+55+45)= .5= 50%