you and your genes

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  • Created by: naf
  • Created on: 28-10-12 12:03
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  • you and your genes
    • proteins
      • structural
        • hair
        • blood
        • collagen
          • bones
          • tendons
          • cartilage
        • skin
      • functional
        • amalase
          • digestion
          • starch
    • instructions
      • organisms
        • function
        • develop
      • nucleus
        • chromosomes
          • 23 pairs
          • DNA
            • genes
    • inheritance
      • variation
        • sexual reproduction
      • sex cells
        • females
          • XX
        • males
          • XY
            • Y
              • absense
                • ovaries develop
              • presence
                • triggers development of testies
      • alleles
        • dominant
          • 1 or 2 = will show
        • recessive
          • 2 = will show
          • 1 = no show
        • 2 alleles for each gene
          • hetrozygous (different)
          • homozygous (same)
    • genetic disorders
      • huntingtons disease
        • dominant
        • symptoms
          • inability to concentrate
          • memory loss
          • late onset
          • clumsiness
          • mood changes
          • tremors
      • cystic fibrosis
        • recessive
          • not show symptoms
          • carrier (can pass to children)
        • symptoms
          • chest infections
          • difficulty digesting food
          • thick mucus
          • difficulty breathing
    • genetic testing
      • testing before drug prescription
        • how drug  affects person
        • effective treatment?
        • adverse reaction?
      • predictive testing for genetic diseases
        • couples = find out if their children are likely to inherit a genetic disease
        • check if they carry alleles for genetic disorders
      • in vitro fertilisation
        • checking the embryos for genetic disorders
          • pre-implantation genetic diagnosis
          • embryos for embryo selection
            • genetically disordered embryos = discarded
            • healthy embryos = mothers womb
      • implications
        • whether or not to have children at all
        • using results that may not be accurate, including false negative and false postives
        • whether or not a pregnancy should be terminated
        • risk of miscarriage as a result of sampling for the genetic test
        • whether other members of the family should be informed or tested
        • empolyers may not give the job to a person who is likely to get ill
        • insurance companies may refuse to give life insurance to people with the 'wrong' alleles
    • clones
      • individuals with identical genes
      • bacteria, plants and some animals can reproduce asexually to form clones
      • any differences are due to environmental factors
      • clones of plants occur naturally when plants produce bulbs or runners
      • animals
        • artificially
          • when the nucleus from an adult body cell is transferred to an empty unfertilized egg cell
        • naturally
          • when cells of an embryo separate (identical twins)
    • stem  cells
      • adult stem cells
        • can develop into many types of cells
      • embryonic stem cells
        • can develop into any types of cells
          • offer potential to treat some illnesses
            • can develop into many types of cells
      • the majority of cells of multicellular organisms become specialised during the early development of the organism

Comments

? Secret - Team GR

Is this the OCR 21st Century board ? B1 ?

naf

yes, this is the OCR 21st century science, covered most of the specification :)

Fishinmypocket <3

Hiya Naf,

Is this all I need to know for B1?

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