Final answer:
The Hominoid lineage diverged from a common ancestor approximately six million years ago.
Step-by-step explanation:
The Hominoid lineage diverged from a common ancestor of humans and great apes approximately six million years ago. This divergence is supported by evidence from the fossil record and a comparison of human and chimpanzee DNA. The term 'hominin' is used to refer to species that evolved after this split and are more closely related to humans than to chimpanzees.