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.
Fossils are the preserved remains or traces of animals and plants. They form by a process called fossilization. Fossils are usually found in rock, but they can also be found in mud or gravel. Most have lain buried for millions of years. The word fossil comes from the Latin word fossilis.