Unit 4 - Genetic information, variation and relationships between organisms
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Genetic information, variation and relationships between organisms Condensed Notes
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Unit 4 - Genetic information, variation and relationships between organisms
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AQA
The following document contains my structured and easy to read condensed notes filled with great diagrams for all of Biology AQA A level. The boxes for every chapter contain all the concepts you need to know for each chapter with the notes are followed below. Notes are bite sized and will help with...
Unit 4 - Genetic information, variation and relationships between organisms
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Genetic Information, variation and relationships
between organisms
Contents
● Protein synthesis
○ Transcription DNA → mRNA
○ Translation
● Meiosis
○ Gene mutation
○ Crossing over
○ Independent segregation
● Biodiversity
● Measuring variation
● Classification system
● Natural selection
○ Directional and Stabilising selection
● DNA is stored differently in different organisms
○ Eukaryotic
○ Prokaryotic
● DNA contains Genes that code for
○ Amino acid sequence of a polypeptide
○ A functional RNA
● Genes can exist in different forms called alleles
● Homologous pair of chromosomes
, ● Protein synthesis
○ Transcription (in nucleus) DNA → mRNA
■ Splicing
○ Translation (in cytoplasm) mRNA → Protein
■ tRNA
● Anticodon
● Genetic Diversity + Adaptation
○ Genetic diversity - total number of different alleles in a population
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