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.
Definition of fossil for English Language Learners. : 1  something (such as a leaf, skeleton, or footprint) that is from a plant or animal which lived in ancient times and that you can see in some rocks. : 2  a person whose ideas are very old-fashioned or out-of-date.