That normally occurs after you eat green vegetables (Which contain chlorophyll), fruit or food colorings. Its not something to be worried about unless your already very sick, and if you were, you would know it.
Answer:
I think the answer is capacity to do work
Hey its p(A) = 0.1 and q(a) = 0.9
The percentage in the population of heterozygous
individuals:
2pq = 2 x 0.1 x 0.9 = 0.18 = 18%