1. Reproduction
Study Pack #5

2. Today’s Goals! I can compare sexual and asexual reproduction.
I can identify the advantages and disadvantages of sexual and asexual reproduction.

3. Reproduction The passing of heredity material to an offpspring
Some organisms reproduce sexually, and others asexually
Some organisms can reproduce both sexually and asexually

4. Asexual Reproduction Involves only one parent
Simple (single-celled) life forms, like bacteria
Produces two offspring with hereditary information that is identical to the parent cell

5. Asexual Reproduction Types Budding Branching Regeneration
Binary Fission

6. Binary Fission Bacteria reproduce through binary fission
A copy of the chromosomes is made and then the bacteria cell divides in half so that each new cells gets one set of chromosomes
This is very similar to MITOSIS

7. Advantages and Disadvantages of Asexual Reproduction
Organism does not have to wait for a partner to reproduce
Disadvantages
Offspring are exactly like parents
No variation
Can pass on mistakes (mutations/disease)

8. Sexual Reproduction
The process through which two parent cells join to produce offspring
Called fertilization
The cells involved have only half the number of chromosomes of a normal cell

9. Meiosis
Ensures that a cell produced by sexual reproduction has the correct number of chromosomes
At the end there are four cells with half the number of chromosomes as the original cell

10. Meiosis In males, it produces sex cells called sperm cells
In females, it produces sex cells called egg cells
A sperm cell can join with an egg cell to produce a cell with a complete set of chromosomes
This is called fertilization!

11. Advantages and Disadvantages of Sexual Reproduction
Offspring are not genetically identical to either parent
Adds variation
Disadvantage
Two partners are needed

12. Reproduction in Plants
Almost half of plants reproduce sexually to produce seeds
Pollen – sperm cells
Egg cells
Pollen fertilizes eggs cell and produce a seed

13. Reproduction in Plants
Some plants reproduce asexually
Budding or branching

14. Assignment
Create a Venn diagram to compare sexual and asexual reproduction