Sentences with phrase «human and chimpanzee lineages»

Because the human and chimpanzee lineages split between 5 million and 7 million years ago, and humans are the only apes that engage in cooperative breeding, researchers have puzzled over how this helping behavior might have evolved all over again on the human line.

The human and chimpanzee lineages split off from each other between 5 million and 7 million years ago.

Human and chimpanzee lineages probably split about 5 million years ago and now show a 10 per cent mtDNA difference.

Not exact matches

The first divergence produced the gorilla lineage, while the second produced the ancestors of chimpanzees and humans.

Scientists believe that modern human and common chimpanzee / bonobo lineages split about 8 million years ago with the two great ape species splitting about 2 million years ago.

Orangutans were next, followed by gorillas, with the chimpanzees and human lineages diverging from each other last.

«When we looked at gene expression, we found fairly small changes in 65 million years of the macaque, orangutan, and chimpanzee evolution,» said study author Yoav Gilad, PhD, assistant professor of human genetics at the University of Chicago, «followed by rapid change, along the five million years of the human lineage, that was concentrated on these specific groups of genes.

Discovered by Donald Johanson at Hadar in Ethiopia in 1974 and nicknamed «Lucy» this fossil was the most complete skeleton and oldest member of what was then known of the human lineage but numerous scientists disputed she was truly bipedal, stating this species practiced a form of locomotion intermediate between the quadrupedal tree climbing of chimpanzees and human terrestrial bipedality.

Sequencing of a P. malariae relative that infects chimpanzees reveals similar signatures of selection in the P. malariae lineage to another Plasmodium lineage shown to be capable of colonization of both human and chimpanzee hosts.