Question

Using a simple "dice model" in class, we demonstrated that selection is expected to "reduce improbability" and therefore results in very nonrandom results (i.e. "adaptation"). This seems odd to many people because a major aspect of evolution is the production of variation by the random processes of mutation and recombination. In fact, variation in fitness is one factor that is required for selection to work.

Answer 1

Darwinism is all about survival of the fittest. It means, one with better traits will survive when natural selection is carried out. Sexual reproduction results in variations. Genetic recombination occurs in sexual reproduction, due to the crossing over of homologous pair of chromosomes, which produces unique gene combinations. The gene combinations that the offsprings posses are different from their parents which make their survival better. Variations of genes help an organisms to survive. The useful variations continued over generation and later they become permanent according to Charles Darwin.