Cell Division and Asexual Reproduction

Two Types of Reproduction Asexual Only one parent Offspring are identical to parent Sexual Two parents (egg cell and sperm cell)

Types of Asexual Reproduction Binary Fission Budding Vegetative Reproduction Fragmentation Spore Formation

Characteristics of Asexual Reproduction Only one organism is needed to reproduce All the offspring are genetically identical to each other and to the parent organism A single organism can produce large numbers of offspring

Binary Fission Parent undergoes cell division to produce two genetically identical daughter cells or offspring Example: Bacteria

Binary Fission Allows for rapid population growth under ideal conditions Bacteria can double population every 20 mins

Budding Offspring begin as a small growth on the parent Bud keeps growing (cell division) and eventually breaks off from parent Example: Yeast

Vegetative Reproduction Plants that reproduce asexually Strawberries send out “runners” that can form into new plants

Fragmentation Small part of an animal breaks off and grows into a new organism Example: Sea Star

Fragmentation Parent can regrow lost body part Called “Regeneration”

Spore Formation Reproduction via forming large numbers of spores Spores = similar to seeds

Bill Nye: Cloning Video

Cloning Activity - Groups of 3 You and your group are in charge of the Science and Technology branch of the Government of Canada List out the pros and cons of cloning (human, animals, etc.) State your stance on cloning (fully agree on all fronts? Support only animal cloning?) Submit regulations (“we will allow cloning under these circumstances”)

Review Questions To help study for the test Will not be collected, but if you do these questions, it will definitely help Page 70 – 71 Questions 1-14, 17, 18