In your owns words please explain what is meant by the phras

In your owns words, please explain what is meant by the phrase \"evolution is not Lamarkian\" in reference to the generation of mutations and in smaller populations, why does the effect of genetic drift increase and the effect of natural selection decrease?

Solution

Genes do not “fall away”. Genes only go away if they are actively selected against, i.e. that only happens before reproductive age. In other words you don’t live to reproduce. Evolution is not benign, all knowing, or omniscient. It is random due to the conditions at the time. If you do not already possess the genes to live in your changing environment, you die out. You do not produce genes in response to an environment. You have to already have them. Genetic drift is the change in the frequency of the gene variant. It reduces the amount of genetic variation in a population. And with less genetic variation, there is less for natural selection to work with. If the green gene drifts out of the population, and the population ends up in a situation where it would be advantageous to be green, the population is out of luck.