Link to this slang definition. To link to this term in a web page or blog, insert the following. <a href=http://onlineslangdictionary.com/meaning-definition-of/trippy>trippy</a>. To link to this term in a wiki such as Wikipedia, insert the following. [http://onlineslangdictionary.com/meaning-definition-of/trippy trippy]
The two main sources of genetic variation are mutations and recombinations of genes as a result of sexual reproduction. A mutation is a permanent change in the DNA within a gene. Continue Reading. Some mutations, which affect all cells in an organism, are inherited from a parent.
A source of new variability is necessary for continued evolution to occur. Sources of genetic diversity External. Much of variation in populations, species, is retained due to changes in the environment (adaptive traits are only good in some environments, and not in others).or any evolutionary change to occur there must be some genetic variation in the population; the greater the amount of variability, the greater the possibilities for change. Natural selection decreases variability in populations: in a uniform environment, better adapted types should completely replace unfit types.