Natual selection and genetic modification

• A pentadactyl limb is a limb with five digits. This can be seen in a number of organisms, implying that they all come from a common ancesto
• Human hand


  • Five digits (four fingers and a thumb)
• Bats, cats, horses and birds also have the five digit pattern within their limbs
• That does not mean that we evolved directly from these animals
• Humans are distantly related to bats, cats, horses and birds via a common ancestor
• evolution-> gradual change in the charecteristics of a species over timme
• genetic organisms-> has had a gene from another organism put into it
• genetic engineering-> removing a gene that makes a useful product and inserting it into another organism