Genetic Disorders

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  • Genetic Disorders
    • Cystic Fibrosis
      • Caused by recessive allele
      • Its a disorder off the cell membranes, and results in the body producing a lot off thick mucus
      • The allele which causes cystic fibrosis is a recessive allele, carried by one person in 25
      • Because its recessive, people with only one copy off the allele won't have the disorder
      • For a child to have the disorder, both parents must be either carriers or sufferers
      • 1 in 4 chances of a child having the disorder if both parents are carriers
    • Polydactyly
      • Where babies are born with extra fingers or toes
      • The disorder is caused by dominant allele, and so can be inherited if just one parent carries the defective allele
      • The parent that has the defective allele will be a sufferer too since the allele is dominant
      • There's a 50% chance of a child having the disorder if one parent has the allele
    • Embryo Screening
      • Many genetic disorders can be spotted this way eg cystic fiberosis
      • Against- The rejected embryos are destroyed, they could have developed into humans, also screening is expensive
      • For- It will help people suffering, and during IVF most embryos are destroyed anyway, screening just allows the selected one to be healthy


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