![]() ![]() Over time, the proportion of individuals with advantageous traits may increase (and the proportion with disadvantageous traits may decrease) due to their chances of surviving and reproducing.Inherited characteristics affect the likelihood of an organism's survival and reproduction.Natural selection and genetic drift act on the variation that exists in a population.Evolution results from natural selection acting upon genetic variation within a population.The Hardy-Weinberg equation describes expectations about the gene pool of a population that isn't evolving, that is large, mates randomly, doesn't experience mutation, natural selection, or gene flow.Evolution is often defined as a change in allele frequencies within a population.Environmental changes may provide opportunities that can influence natural selection.Depending on environmental conditions, inherited characteristics may be advantageous, neutral, or detrimental.Over time, the proportion of individuals with advantageous characteristics may increase due to their likelihood of surviving and reproducing.Natural selection is dependent on environmental conditions. ![]() Natural selection acts on phenotype as an expression of genotype.Natural selection acts on the variation that exists in a population.Evolution results from selection acting upon genetic variation within a population.There is a fit between organisms and their environments, though not always a perfect fit.Information on controversies in the public arena relating to evolution.Alignment with the Next Generation Science Standards.The big issues – Pacing, diversity, complexity, and trends.Macroevolution – Evolution above the species level.Microevolution – Evolution within a population.Mechanisms: the processes of evolution – Selection, mutation, migration, and more.If dark-colored rock pocket mice had a competitive advantage of 0.1 it would take more than 1000 years for 95 of the population to have dark fur. The history of life: looking at the patterns – Change over time and shared ancestors Dark-colored rock pocket mice, in this population, have fewer offspring than light-colored rock pocket mice.An introduction to evolution: what is evolution and how does it work?. ![]()
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