Before/ securing clothing, wash hands, put on safety gloves
after/sweeping floor and wash hands again
washing hands can go either or both. :)
... termed "hypotonic," meaning less solids (or more diluted) than inside the cell. For fluid movement in/out of cells, water will diffuse (via osmosis) from the hypotonic solution to the hypertonic one, assuming a permeable barrier (i.e. cell membrane) allows it. With this case, water will flow into the cell from outside.
The answer would be C, 50% because you would to set up a punnett square with Dd on the top then DD on the side then cross the two