GCSE Biology - Variation and Evolution

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*** WHAT'S COVERED ***
1. Variation Within Populations
* Genetic Variation (differences in genes/genomes)
* Environmental Variation (influence of surroundings)
* Phenotype (observable characteristics from genes and environment interaction)
2. Mutations as a Source of Variation
* Definition of mutation (change in DNA)
* Effects of mutations on phenotype (neutral, harmful, beneficial)
3. Natural Selection
* Survival of the fittest (individuals with beneficial adaptations survive and reproduce)
* Passing on advantageous traits/genes
4. Evolution
* Darwin's theory
* How natural selection over time leads to changes in species characteristics
* Speciation (formation of new species)
* Evidence for evolution (brief mention of antibiotic resistance and fossils)

*** CHAPTERS ***
0:00 Introduction
0:26 Variation & Phenotype
0:47 Influence of Genes on Phenotype
1:17 Influence of Environment on Phenotype
2:05 Source of Genetic Variation: Mutations
2:53 Natural Selection & Survival of the Fittest
3:41 Evolution & Speciation
4:22 Evidence for Evolution
4:48 Summary of Evolution

*** PLAYLISTS ***










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