Best Answer: Genotype frequencies are the frequencies of the homozygous dominant (AA) heterozygous (Aa) and homozygous recessive (aa). If you're using population genetics, then they are the p^2, 2pq, and q^2 values.
Petrified fossil is an organism that has been converted into stone.  Silica, iron and copper minerals can be commonly found in petrified  fossils.
Fossil(adj) dug out of the earth; as, fossil coal; fossil salt. Fossil(adj) like or pertaining to fossils; contained in rocks, whether petrified or not; as, fossil plants, shells. Fossil(noun) a substance dug from the earth. Fossil(noun) the remains of an animal or plant found in stratified rocks. Most fossils belong to extinct species, but many of the later ones belong to species still living. Fossil(noun) a person whose views and opinions are extremely antiquated; one whose sympathies are with a former time rather than with the present.