Genes with a most recent common ancestor, and thus a shared evolutionary ancestry, are known as homologs. These genes appear either from gene duplication within an organism's genome, where they are known as paralogous genes, or are the result of divergence of the genes after a speciation event, where they are known as orthologous genes,:7.6 and often perform the same or similar functions in related organisms. It is often assumed that the functions of orthologous genes are more similar than those of paralogous genes, although the difference is minimal. COUNT 4
QSN1 What are genes with a most recent common ancestor called? ANS1 homologs QSN2 What is one reason for homologs to appear? ANS2 gene duplication within an organism's genome QSN3 What are genes that occur from duplication within an organism's genome called? ANS3 paralogous genes QSN4 What are genes that result from divergence of the genes after a speciation event called? ANS4 orthologous genes