Quote:
Originally posted by Mike33
Yes, that's natural selection, not evolution. And there is no gaurantee that such genes would be passed down.
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Right, it's a probability.
If a gene is in just one of your parents then you have about a 50% chance of receiving that gene minus about a one in a million chance of a mutation. If both parents have the gene you have a 100% - 1 in a million chance of mutation of receiving that gene.
If a population has a number of organisms with Gene A and Gene B and Gene A organisms have a better chance of surviving than the Gene B organisms then the chances increase that both of your parents carried the gene.
Overall, this leads to a greater probability of Gene A being passed to the next generation and for a group of organisms you will find that Gene A increased its frequency in the next generation.
Would you agree with that?