How could the old and presumably frozen species Homo sapiens evolve so quickly in past few thousands years?
In fact, the frozen plasticity claims that sexual species are not microevolutionary frozen but elastic. Therefore, they readily respond to selection at first (actually, more readily than microevolutionary plastic asexual species), however, they stop responding after the frequencies of alleles decline enough from their equilibrium state. The human races declined from their original state so quickly because of their microevolutionary elasticity.
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The classical Darwinian theory of evolution can explain the evolution of adaptive traits only in asexual organisms. The frozen plasticity theory is much more general: It can also explain the origin and evolution of adaptive traits in both asexual and sexual organisms Read more