Two genes that are orthologs

A) are derived from a common ancestral gene.
B) arose from gene duplication.
C) always perform the same function.
D) all of the above
E) none of the above

Orthologs

Genes across various species originating from a single ancestral gene through the process of speciation, which continue to perform the same function.

Gene Duplication

A genetic event that results in the creation of an extra copy of a gene, leading to genetic variation that can be acted upon by natural selection.