Why we inherit disease

Cards (22)

  • What are inherited disorders?
    Conditions passed on through certain alleles
  • What is polydactyly?
    Condition with extra fingers or toes
  • How is polydactyly inherited?
    It is caused by a dominant allele
  • What happens if one allele is for polydactyly?
    The disorder will still be expressed
  • What is the genotype of a heterozygous individual with polydactyly?
    One dominant and one normal allele
  • What is the expected offspring ratio when crossing a heterozygous individual with a homozygous normal individual for polydactyly?
    1:1 ratio of polydactyly to normal
  • What is cystic fibrosis caused by?
    A recessive allele
  • What is the main effect of cystic fibrosis?
    Thick sticky mucus in the body
  • What allele represents cystic fibrosis?
    Lowercase f
  • How many recessive alleles are needed to have cystic fibrosis?
    Two recessive alleles
  • What is the genotype of most people regarding cystic fibrosis?
    Homozygous dominant genotype
  • What do we call individuals who carry one copy of the cystic fibrosis allele?
    Carriers
  • What is the offspring ratio when crossing two carriers for cystic fibrosis?
    3 normal: 1 cystic fibrosis
  • What is embryo screening?
    Checking embryos for genetic disorders
  • What happens if a genetic disorder is found during embryo screening?
    Parents may discard that embryo
  • What are the advantages of embryonic screening?
    • Reduces overall suffering from health problems
    • Saves money on treating genetic disorders
  • What are the concerns regarding embryonic screening?
    • Implies genetic problems are less desirable
    • Potential future screening for non-health traits
  • What is the current legal status of screening for non-health traits in the UK?
    There are laws preventing this practice
  • What is the main purpose of the video discussed?
    To explain inherited disorders and screening
  • What should viewers do if they enjoyed the video?
    Like and subscribe
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    family tree- inherited diseases/disorders
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    exam- chances of inheritance