How do you figure out the phenotype from a Punnett Square?

The phenotype is the observable characteristics like hair color or skin color.

Explanation:

You would create a regular Punnett Square and just plug in the phenotypes in the square. It would be in the same way you would plug in the genetic types in a Punnett square. The square is just a tool for probability. I learned this last year in 9th grade so my memory is kind of hazy.

If you have any questions feel free to ask in the comments. - Mark.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."