Variation

• What is a characteristic?

  A feature that helps identify an individual
• What does variation refer to?

  Differences in characteristics among individuals
• What are the two categories of variation?

  • Inherited variation
  • Environmental variation
• What is inherited variation?

  Differences caused by genetic information from parents
• Give two examples of characteristics showing inherited variation.

  Eye color and blood group
• What is environmental variation?

  Differences caused by environmental factors
• What are two examples of characteristics determined by environmental variation?

  Scars and tattoos
• How do scars demonstrate environmental variation?

  They result from behavior and activity changes
• How do tattoos demonstrate environmental variation?

  They are lifestyle choices made by individuals
• What characteristics can be caused by both inherited and environmental variation?

  • Weight
  • Height
• How does inherited variation affect weight?

  It determines a potential weight range
• How does environmental variation affect weight?

  Diet and lifestyle choices influence weight
• How does inherited variation affect height?

  It determines a potential height range
• How does environmental variation affect height?

  Malnutrition can limit height growth
• What factors determine weight and height?

  • Inherited variation (genetics)
  • Environmental variation (diet, lifestyle)
• Where can you find more videos related to this topic?

  At gcse revisionmonkey.com
• What does the key stage 3 package contain?

  Revision monkey videos and resources
• What is the term for differences in characteristics between individuals of the same species?

  Variation
• How is inherited variation passed on?

  Via genes during reproduction
• What is environmental variation?

  Variation due to surroundings or actions
• Name three examples of species.

  Humans, dogs, goldfish
• How do different species differ from each other?

  They have different characteristics
• What characteristic do dogs have that humans do not?

  Tails
• What does it mean that no two members of a species are identical?

  They have differences in characteristics
• What is the term for the differences between individuals in a species?

  Variation
• How does variation help a species survive?

  By causing genetic and physical differences
• What causes characteristics in an individual organism?

  Genetic and environmental variation
• How does a dog's weight relate to variation?

  It is caused by genes and diet
• What factors influence the height of a sunflower?

  Genes and amount of light and water
• What is the risk of all individuals in a species being genetically identical?

  They could all be wiped out by disease
• What is meant by "survival of the fittest"?

  Individuals with advantageous traits survive
• What happens to the offspring of surviving members of a species?

  They are likely to inherit desirable traits
• What is the definition of variation?

  Differences between individuals of the same species
• What are the two types of data collected in surveys of variation?

  Continuous and discontinuous variation
• What is genetic variation?

  Inherited differences from parents
• What is environmental variation?


  Differences caused by the organism's environment
• What is genetic and environmental variation?

  Differences caused by both factors
• How is data on variation analyzed?

  By surveying the population
• What is continuous variation?

  Results that come in a range
• Give an example of continuous variation.

  Human height