Drill 14 2/12/13 List 3 steps to binary fission. What do bacteria form when they reproduce?
Drill 14 2/12/13 List 3 steps to binary fission. DNA replicates and cell elongates Cell wall and membrane began to divide Cross walls form around DNA and cell divides. What do bacteria form when they reproduce? Colonies
Objectives SWBAT describe 8 different types of asexual reproduction SWBAT identify the phases of meiosis and recognize the differences between mitosis and meiosis.
Agenda Asexual reproduction Meiosis Notes
Asexual Reproduction
Division in Prokaryotes… What characteristics of prokaryotes do you remember? Watch the video clip and record any observations you make. MAKE SURE THE SOUND IS ON.
Reproduction in Prokaryotes: Binary Fission Division of one cell into two identical offspring cells
Asexual Reproduction in Animals… Example 1 – Paramecium Binary Fission New organism is created by equal division of nuclear material and cytoplasm Have the students watch the video clips and record their observations. NOTE: TURN OFF SOUND FOR THIS VIDEO. (Very annoying music.)
Asexual Reproduction in Animals… Example 2 - Hydra Budding New organism develops from some generative point of the parent organism Also seen in yeast cells
Asexual Reproduction in Animals… Example 3 - Starfish Regeneration An entire new organism is produced from part of a parent organism or specific parts of an organism can be regenerated if lost
Asexual Reproduction in Plants… Example 1 – Coleus & Geraniums Cuttings New plant can develop from part of a leaf or stem from a parent plant
Asexual Reproduction in Plants… Example 2 – Tulips & Onions Bulbs New plant is produced from thick underground stem with leaves
Asexual Reproduction in Plants… Example 3 - Potatoes Tubers New plant is produced from underground storage stem Ask students, “Have you ever left a potato sit around too long? What started to happen?
Asexual Reproduction in Plants… Example 4 - Strawberries Runner New plant arises from parent plant by forming a stem like structure that grows along the top of the ground
Asexual Reproduction in Plants… Example 5 – Seedless Oranges & Jonagold Apples Grafting technique that attaches the stem from one plant to the stem and roots of another plant Produces a hybrid plant that has characteristics of both plants
Practice Identifying Asexual Reproduction
Today’s Wrap-up… Watch the video clip about planarian regeneration and respond to the following prompt: What can scientists stand to learn from the regenerative properties of the planarian? Only view the first 5 minutes of the video.