1. Sand particles are too big to dissolve so their density sinks them
2. Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles.
The other cat has (I dont know what letters your using so I'm going to use 'c'. The first genotype looks like this cc the other Parent has to have a donomint trate as well as the recessiv Cc