Inheritance, Variation and Evolution U6

• What is the structure of DNA ?


  • Double helix
• What are the components of a Nucleotide ?


  • A Phosphate , Sugar and Base
• What is an mRNA molecule ?


  • A messenger molecule that copies the code from DNA and carries the message to the ribosomes
• What is a mutation ?


  • A random change in the DNA sequence of a gene or chromosome
• What pairs do Amino Acids make ?


  • A and T

  • C and G
• How many Amino Acids make a protein ?


  • Three
• What is Meiosis ?


  • Mostly the same as mitosis, however the daughter cells made will half again to make gametes (sex cells)
• Why is Genetic Variation important ?


  • A species is more likely to survive as they will most likely be wiped out if every organism was the same if a disease targeted it
• What is the process of Selective Breeding ?


  • Breed two parents that have the desired trait together to produce an offspring

  • Breed the offspring with the parent to produce more offspring

  • Keep breeding the organisms together over a long period of time till all the offspring have the trait you desire
• What are the different parts of the Classification System ?


  • Kingdom

  • Phylum

  • Class

  • Order

  • Family,

  • Genus

  • Species