Biology

• What is an allele


  Different form of the same gene
• Who discovered DNA is a double helix

  Watson and crick
• How are chromosomes arranged

  In pairs in a line
• Why are adults bone marrow stem cells more effective 


  won’t reject
• What is hormone

  Chemical message carried by blood to a target organ
• Where do you find chromosomes


  Nucleus
• How many cells are made in mitosis and meniosis?


  Mitosis =2

  meniosis=4
• What are the four bases in DNA called?

  A, T, G, C
• Who proposed the natural selection theory?

  Charles Darwin
• What is a stem cell?

  Undifferentiated cell.
• What does the genotype XX mean?

  Female
• What does genotype XY mean?


  Male
• • What do plants compete for?
  • Light
  • Space
  • Minerals
  • Water
• What happens when our blood sugar is high?

  Pancreas detaches release insulin into blood converts glucose to glycogen stored in liver
• What happens if mitosis isn’t controlled?

  Cancer
• Which two parts make up the name of an old organism?

  Genus and species
• how do white blood cells protect us from infection?


  Release antibodies

  Destroys bacteria
• Why do we do meiosis?


  Make gametes
• why do new drugs need to be tested?

  Find side effects
• What do animals compete for?

  • Shelter
  • Food
  • Mates
  • Dominance
• What is genetic modification?

  Transfer of jeans from species to another
• What is a gene?


  A selection of DNA that codes for protein
• How can stem cell be used to treat?

  Pancreas-stem cell

  Nerve cell

  Heart disease-stem cell

  Heart muscle cell