G7 Ch4.2 - Asexual Reproduction

1. Asexual
Reproduction
Chapter 4 Lesson 2
p.128-137

2. Asexual Reproduction
•A one-parent organism produces offspring
without meiosis and fertilization
•Offspring inherit the parent DNA
•Genetically identical

3. Budding
Animal
Regeneration
Cloning
Vegetative
Reproduction
Mitotic
Division
Fission
Asexual
Reproduction

4. Fission
•Prokaryotes divide rapidly through fission
–Pro = No (no nucleus)
•Steps
1.The DNA molecule is copied
2.Each copy attaches to the cell membrane
3.Cell grows and splits
4.Finally, two new cells with one copy of the
DNA
*Original cell no longer exists

5. Fission

6. Mitotic Division
•Unicellular Eukaryotes
–Eu = Yes (Yes, it has a nucleus)
•Unicellular organism divides by mitosis
and cytokinesis.

7. Budding
•A new organism grows by mitosis on the
body of the parent
•Genetically Identical
•When bud is large enough it can break
from the parent

8. Animal Regeneration

9. Animal Regeneration
•Offspring grow from a piece of the parent
•When the parent is cut or divided, the
pieces has the potential to grow into a
new organism

10. Regeneration
•“Regeneration” also means the ability to
grow back parts of the body
•This is not asexual reproduction because
it goes not produce a new organism

11. Vegetative Reproduction
•Offspring grows from a part of the parent
plant

12. Cloning
•Asexual reproduction done in a
laboratory to produce identical
individuals from a cell or a cluster of cells
taken from a multicellular organism

13. Cloning - Plants
•Grown from meristems in culture
•“Meristem” – stem cells

14. Cloning - Animals
•All the clone’s chromosomes come from
one parent
•The first mammal cloned was a sheep
named Dolly
•Could save endangered species
•Ethical issues

15. Cloning - Animals