RG Variation

• What is variation?


  The differences that exist between individuals
• How can variation within a species be measrued?

  using differences in the base sequence of DNA or in the amino acid sequence of proteins.
• There is variation between what?

  BETWEEN species and WITHIN species
• What can variation be caused by?

  genetic factors, differences in environment
• Explain how variation BETWEEN SPECIES can be caused by GENETIC factors?

  Different species have different genes, which causes variation between species
• Explain how variation WITHIN A SPECIES can be caused by GENETIC FACTORS?

  Individuals of same species have same genes, but different alleles = causes variation
• What differences in the environment cause?

  Variation WITHIN A SPECIES
• Give exaples of differences in the environment causing variation within a species?

  Climate

  Food

  Lifestyle
• What is most variation WITHIN a species caused by?

  a combo of genetic + environmental factors