How can the two chromosomes that make up a homologous pair differ? They can contain different alleles for the same trait.
They can contain genes that code for different traits.
They can contain the same genes in different orders.
They can contain a different number of genes.

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.