rocketpig on 07 March 2008
| libellule said: @Rath, I see ur point but I m not totally convinced. In a way, if there is a new character, what is the need to spread it on the whole population ? I think all sould be linked to geograpical isolation that may be the "starter" of speciation. I m not sure, Im just not convinced. and where starts a small group ? 2 ? 100 ? 1000 individus ? |
The reason a small population is needed is because even creatures of the same species have varying genetic code. The smaller the population, the higher the chance of that evolutionary mutation taking hold before it is "watered out" of the genetic pool. A small isolated population increases the chance of a specific tool evolving and spreading to the entire population quickly, allowing a new species to emerge without mingling with the old species and either dying off or turning recessive.
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