18.2 - Variation in phenotype

• Why may individuals within a population of a species show a wide range of variation in phenotype ?

  Due to genetic and environmental factors
• What’s the primary source of genetic variation ?

  Mutations
• What are the 3 main factors that cause genetic variation ?

  Mutation, Meiosis, Random fertilisation of gametes during sexual reproduction
• What shape is the normal distribution curve ?

  Bell-shaped