RG Investigating Variation

• What can variation be caused by?

  genes, the environment, or both
• what is variation?

  the differences that exists between individuals
• where is there variation?

  between species and within species
• what can variation be caused by?

  genetic factors

  • different species have different genes, which causes variation between species
  • individuals of the same species have the SAME GENES but DIFFERENT ALLELES - this causes variation within a species