What is evolution? Evolution is the change of allele frequencies over a long period of time that in results are new species coming from the original species. This page will tell you everything you need to know about the Theory of Evolution. Essential question: How is adaptation important?
MEchanisms of evolution
All species have a different genetic characteristic. These different species has a typical number of chromosomes and a certain set of genes. However, since every organism and individual is different, we all have different versions of genes (also known as alleles) and different traits. When species evolve overtime, traits will become for common and others will disappear completely.
Natural Selections: Natural selection is a mechanism which process which individuals are most likely to survive and reproduce changing the alleles in the specials or just that population. Natural selection does not make organism superior to other in any way. It just makes the organism more fit to survive in there environment. Natural selections principles and processes: - Organisms will reproduce more then there environment can support due to the fact that not all the offspring will survive. - Offspring will very in phenotype meaning that some offspring will be able to survive in their environment better then others. This is due to the differences in the alleles inherited by the offspring. - Some organisms with certain alleles will survive and reproduces which will change the alleles frequencies. This will make more organisms to have the helpful alleles.
Genetic Drift: Genetic Drift is the change in the allele frequencies due to change events and not differences in fitness.
Migration: Migrations in the movement of individuals into an new environment into and out of population that change change the allele frequencies.
The founder effect: The founder effect is the decrease in the gene variation in an population. This will result in a new population from just a few individuals from a larger population.
biological evolution
The theory of evolution says that every species on the plant today came from a species that previously existence. This means that any species are related due to the fact that they share a common ancestor. We know that over time new traits evolve in certain species. We can see patterns of similarities and differences among species throughout evolution by looking at fossils, anatomy, and DNA.
Quiz!!!!
1. Natural selection alleles ______ the population? a. Increase b. freeze the rate of c. decrease
2. Evolution is the change of what? a. years that passed b. allele frequencies c. population
3. True or false: individuals evolve , not the population. a. True b. False
4. How is it good to adapt to your environment?
5. Does every species have the same amount of chromosomes?