6533b870fe1ef96bd12cf013
RESEARCH PRODUCT
Vers une approche globale de l'évolution des Hominidés
Jean Chalinesubject
Genetic divergenceHomo habilisAustralopithecusPhylogeneticsHomo sapiensHominidaePongidaeZoologyOcean EngineeringBiologybiology.organism_classificationHeterochronyEcology Evolution Behavior and Systematicsdescription
Abstract Two models of diversification of the common ancestor of gorillas, chimpanzees and men can be proposed on the basis of the distribution of chromosomal rearrangements in extant species and reconsideration of the role played by climate. The small genetic divergence between chimpanzees and humans is greatly amplified at the morphological level, thus constituting the ‘human paradox’. This paradox is resolved by the economical and flexible evolutionary mechanism of mutations in regulator genes and the heterochronies they control, which are the true internal clocks of evolution. Changes in cranial morphology are quantified and used to analyse and explain the steps in the transition from great ape to human morphology. By comparison at the various stages of development, it is suggested that from great apes to modern man numerous heterochronies have occured during ontogeny (hypermorphosis, hypomorphosis and post-displacements).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-03-01 | Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science |