Evolutionary innovation

One calls evolutionary innovation a genetic innovation (change) fixed in a Population or a Espèce because it involves a modification of a character (Phénotype) which will appear advantageous with respect to the Natural selection.

Methods of creation of new alleles and their consequences

Types of change and effects on the phenotype

to see change

Methods of creation of new genes

Stages allowing the formation of new genes

Genes known as " nouveaux" obviously always come from preexistent sequences in the genome. Most of the time, the new genes result from the duplication of another gene, the two sequences being able thereafter to derive independently one of the other. It is about a frequent phenomenon on an evolutionary scale; the majority of genes belong to multigenic families, sometimes consisted of several tens of members who derive all from/to each other. It happens however that a new gene appears by recombination between not-related sequences: the new gene is then a " patchwork" of two more or less functional ancestral sequences.

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