Key Words

• Variation


  The differences between individuals of a species
• Continuous Variation


  The differences in heights, weights between people.
• Discontinuous variation


  The differences between hair colour, eye colour between people.
• Mutation


  The change in a gene or DNA caused by ionising radiation.
• Sexual reproduction


  Sex between two parents and results in different offspring.
• Asexual reproduction


  Offspring are identical to the parent - clones.
• Clone


  An organism that is genetically identical to the parent.
• Cystic Fibrosis


  A respiratory disease caused by a recessive allele.
• Evolution


  The slow continual change of an organism over time.
• Heritable (inheritance)


  The characteristics that you get from your parents.
• Natural Selection


  Theory proposed by Charles Darwin.
• Fossils


  The hard remains of animals (bones) that once lived.
• Extinct


  A species that once lived but no longer survives.