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Pattern of Inheritance - Coggle Diagram

- - - - The splitting of a genetically similar population into two or more populations that undergo genetic differentiation and eventually reproductive isolation, leading to the evolution of two or more new species.
    - - Behavioural Differences
        
        Two populations may have different courtship behaviours. Thus, individuals of the two populations will not mate, preventing gene flow and leading to reproductive isolation.
      - Ecological Differences
        
        Two populations may occupy two different habitats within the same region and experience different selection pressures. This can lead to natural selection acting separately on each population and speciation and eventual reproductive isolation.
- - - - Mustard Gas
      - Nitrous Acid
    - - Food Contaminants
      - Transpsons
      - Some Viruses
    - - UV light
      - Gamma Rays
      - X - Rays
  - - - Non- Disjunction
        
        A pair of chromosomes or chromatids fails to separate, leaving a gamete with an extra chromosome. When fertilised by a normal haploid gamete,resulting zygote has one extra chromosome.
      - Deletion
        
        Part of a chromosome that contains a sequence or gene is lost.
      - Inversion
        
        Part of the chromosome breaks off.
        Then it turns 180 degrees. Then the part of the chromosome joins back on. The gene is still present by the regulatory sequence not express it fully.
      - Translocation
        
        Part of a chromosome breaks off and and attaches to another chromosome. Can interfere with regulation of genes on translocated chromosome.
      - Duplication
        
        Part of the chromosome is duplicated. Overexpression of genes can be harmful, because too many of certain proteins or gene regulating nucelic acids can disrupt the metabolism.
    - - Caused due to meiosis