What is the inside correlation of the chromosomal mutations to evolution?

Question

It is believed that variation is the raw materials for adaptation, natural selection, and evolution of species. Genetically, variation could be traced during the chromosomal distribution in meiosis. So now, what is the correlation of chromosomal mutation to evolution of species, and the erradication of unfit organisms?

Answer 1

The eradication of unfit organisms arises from natural selection (not mutation); that's the second half of the theory of evolution (now a proved fact). Mutations (the first half) can arise from a number of things, including abnormal meiosis; alteration of bases due to radiation or chemicals is probably a more important factor.

Answer 2

Genes are the raw units of heredity. Genes exist on Chromosomes. So, if Chromosomes mutate. We have species variation. The correlation of chromosomal mutation to evolution of species and the eradication of unfit organisms is proven in species that are extinct or on the verge of extinction. So, a Polar Bear is fit for a very specific enviornment. It took many mutations over many generations for the Polar Bear to develop. It continualy evolves to it's "challenges" in it's enviornment. In a sample population of Polar Bears. The most fit are the ones who can trap the most heat or block the most cold. Some have mutations or genes on their chromosomes that make their furs better able to trap heat than others. These bears can stay in the colder water longer or stay out longer and hunt longer. So,they are more likely to catch food and survive to passon their genes.
But, their enviornments is changing . It's heating up. So,the mutations that code for thick fur will eventually be detrimental to survival for bears if the planet keeps getting warmer.

Answer 3

http://en.wikipedia.org/wiki/Genetic_mutation