1. Do Now What are the preexisting cells called before they divide?
Parent Cells
2. What are two new cells called after cell division?
Daughter Cells
3. What does reproduction mean?
Formation of new individuals

2. AIM: What is the difference between asexual and sexual reproduction?

3. Reproduction The formation of new individuals
One of most important traits of living things
For a small organism with one cell, they can just carryout cell division – no dating, no breakups!

4. Let’s remember…
What classification do organisms have to be to be able to mate with each other?
Species – organisms must have the same species classification to mate
Ex: Giraffe cannot mate with a horse because they are not the same species

5. Two types of reproduction
Asexual Reproduction
Sexual Reproduction

6. Just like regular cell division!
Asexual Reproduction
The production of genetically identical offspring from a single parent
The daughter cells have the SAME DNA
“a-” prefix means “without” – so reproduction without fusing reproductive cells
Just like regular cell division!

7. Asexual Reproduction Relatively simple, efficient, and effective
Enables populations to increase in numbers quickly
Can occur in single-cellular or multicellular organisms
Ex: Bacteria, Hydra

8. Review
Asexual reproduction of organisms normally results in new organisms that contain cells with
more chromosomes than are found in the cells of the parent
half the number of chromosomes
the same number of chromosomes
fewer chromosomes that are found in the cells of the parent

9. Review
If an organism reproduces asexually, its offspring will most likely be
genetically different from each other
produced from specialized cells known as gametes
genetically identical to the parent
produced as a result of fertilization

10. Sexual Reproduction The fusion of two separate parent cells
Offspring produced by sexual reproduction inherit some of their genetic information from each parent

11. Sexual Reproduction Most plants and animals reproduce sexually
Some single-celled organisms do, too
Ex: Humans, flowers, dogs, cats

12. Review
The members of a certain species of grass in a lawn are genetically identical. The best explanation for this observation is that the species most probably reproduces
by an asexual method
after pollination by the wind
after pollination by a particular species of bee
by identical sperm fertilizing the eggs

13. Reivew
The diagram shows a sequence of events. The sequence of events from rabbits to zygote is known as
sexual reproduction
fission
sporulation
vegetative propagation

14. Review
A colony of red bacteria is allowed to reproduce for 16 generations.  A scientist examines the colony at the end of this time and notes that all the individuals are almost identical in all characteristics.  This evidence suggests that the bacteria
did not receive the proper nutrients
reproduced sexually
exchanged genetic material
reproduced asexually

15. Review
Which two organisms in the diagram typically reproduce asexually?
A and H
C and F
E and G
F and I