ap biology
posted by claudia .
we are looking at the Hardy weinberg equilibrium theory and we were given fifty problems to work over the break and even though i have answered most of them there is one that has be taken a long time because I am not sure if it can be solved. here is the question i hope you can help me.
I have three populations of birds.
Population 1 has ten birds, of which one is brown (a recessive trait) and nine are red.
Population 2 has 100 birds ten of which are brown.
Population 3 has 30 birds and 3 are brown.
Which one has the highest frequency of the allele for brown feathers.
Please tell me how to approach this problem.

They all have the same frequency.
http://en.wikipedia.org/wiki/HardyWeinberg_principle#Graphical_representation
Small populations have bottleneck tendencies. 
thank you very much