Eye color, hair color, and skin color are polygenic traits. Polygenic traits result from recessive genes.
many genes.
codominant genes.
epistatic genes.

b.have there own function.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added