Cell Division and Asexual Reproduction Two Types of

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

Cloning 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 1. List out the pros and cons of cloning (human, animals, etc. ) 2. State your stance on cloning (fully agree on all fronts? Support only animal cloning? Human cloning? ) 3. 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 184 - 185 • Questions 2, 4, 6, 7, 10, 12, 16, 20