Year 9 Presentation on Binary Fission

2.  Offspring from a single parent
 Genetically Identical Offspring
 Single celled organisms
 Many plants and fungi

4.  Cell separates into two new cells
 Prokaryotes and some Eukaryotes
 All bacteria
 Two identical cells
 Bacteria DNA has high mutation rate
 Genetic change – develop resistance to antibiotics and
invade a wide range of environments

6.  Before it divides it grows so the new cells are the
correct size, not smaller
 The Single DNA molecule first replicates.
 It then attaches each copy to a different part of cell
membrane

7.  Observe the bacteria growth from dirty hands and
‘clean’ hands

8.  Bacteria levels will be greater from dirty hands and,
therefore, we will see greatest growth here with more
visible colonies

9.  Petri dish with agar (medium and nutrients)
 Use a vivid to divide it in half
 Label one half BW the other AW
 Place three fingers on the BW side
 Wash your hands with soap and place the same three
fingers on AW side
 Close dish, tape it closed and write initials on it.
 Store in incubator

10. Controls/Factors of Experiment
 Agar
 Upside down
 Tape
 Before washing and after washing
 Incubator