Afly has two alleles for the color of its eyes and green allele is recessive and is represented by q the blue a little is dominant and is represented by p if 11 of 100 organisms are green what is q

The alellic frequency  for green-eyed trait, Q = 0.33

Explanation:

This is the proportion or frequency of the green-eyed genotype in a population, denoted as (QQ) that equals Q².  

This is the proportion of a specific allele, in this case, Q, respect to the pool of alleles. Results are expressed in proportions, so the sum of every allelic frequency for one locus equals one.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: