Variation

• What is the process of embryo screening?


  It involves analyzing genes from embryos before implantation during IVF.
• What is variation within a species?


  Differences among organisms of the same species.
• What are the two types of variation?

  Genetic variation and environmental variation.
• What causes genetic variation?


  Differences in genes inherited from parents.
• How are genes passed on to offspring?


  Through sex cells (gametes) from both parents.
• What is the significance of combining genes from two parents?


  It causes genetic variation among offspring.
• What is environmental variation?


  Differences caused by the environment in which organisms live and grow.
• What is a drawback of selective breeding?


  It reduces the gene pool.
• What is inbreeding?


  Breeding closely related organisms, which can lead to health problems.
• What are the risks of a reduced gene pool in selective breeding?


  Increased chance of inheriting harmful genetic defects and vulnerability to diseases.