Answer:
There are two answers to this question. Gold or Aluminum.
Propagation is a form of asexual reproduction
The highest point the medium rises to and a trough is the lowest point the medium sinks to.
A dominant allele can produce a dominant phenotype in individuals with one copy of the allele from one or both parents, but a for recessive allele to produce a recessive phenotype, the individual needs to have two copies, one from each parent.