Biology B5 - OCR - Mindmap in GCSE Biology

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Created by: lala2127
Created on: 09-06-18 16:29

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Biology - B5
- Inheritance
  - Genome
    - Entire genetic material of an organism
    - Interacts with the environment to give the organism characteristics
      - e.g weight
    - Leads to variation within a population
  - Variation
    - Discontinuous
      - Something with a limited number of possibilities (specific)
      - e.g blood group
    - Continuous
      - Something with a wide range of possabilities
      - e.g height
    - Leads to different genotype and phenotypes
  - Mutations
    - Random change in a gene or chromosome
    - Happen contuinuously
    - Starts to eventually change species - Leads to wide range of the same species with different phenotypes
  - Sexual Reproduction
    - Male and female gametes join to create a zygote
    - You have 23 pares of chromosomes - 23 from mum and 23 from dad
  - Meosis
    - Stat off with a parent cell where the chromosomes make copies of themselves. Similar chromosomes pair then the cell splits into two and the chromosomes divide
  - XY = Male, ** = Female
- Natural Selection and Evolution
  - Classification System
    - The Five Kingdoms
      - Animals
      - Plants
      - Fungi
      - Protists
      - Prokaryotes
    - Further Divisions
      - Phylum
      - Class
      - Order
      - Family
      - Genus
      - Species
  - Natural Selection
    - Charles Darwin
    - Organisms that are better suited to the environment survive
    - Overtime it created evolution
    - 'Survival of the Fittest'
  - Evidence for Evolution
    - Fossils
      - Where they are in the ground - higher up = newer fossils
    - Trees
      - Look at branches or rings in the roots
    - Development of Antibiotic Resistance
    - MRSA