Transcript Sexual vs. Asexual Reproduction

Sexual vs. Asexual
Reproduction
Credits to:
Brianna Shields
October 19, 2004
DO NOW- Hwk on desk!
1. Which cell part is green, found only in
plants and is the site of photosynthesis?
 2. Which cell part acts as the cleanup
crew, recycling old cell parts?
 3. Which cell part is found in both animal
and plant cells and produces the energy
for the cell?

Homework
Please clear everything except your
homework off of your desk
 We will go over it together
 It is your responsibility to make the
corrections

GOAL
To compare forms of sexual and asexual
reproduction
 To understand the process of mitosis

Sexual Reproduction

Sexual
 1. 2 parents
Reproduction  2. Sex cells: sperm and
egg
 3. Sperm and egg join=
fertilization
 4. Offspring look different
from parent (mixed DNA)
Sexual Reproduction

Sexual
 5. Examples
Reproduction
– Humans, some plants,
mammals, fish, reptiles, etc.
Sexual Reproduction
Asexual Reproduction

Asexual
 1. One parent
Reproduction  2. No sex cells
 3. Offspring produced by
cell division
 4. Offspring identical to
parent (same DNA)
 5. Several types in plants
and animals
Types of Asexual
Reproduction

Binary
Fission





1. Organism divides in half
2. 2 identical daughter cells
produced
3. Daughter cells are half
the parent’s size
4. Daughter cells grow,
then divide too
5. In bacteria
Types of Asexual
Reproduction

Budding

1. Small bud grows out of
parent cell
 2. Two different sized cells
made (with identical DNA)
 3. Bud breaks off and
grows
 4. In yeast and hydra
Types of Asexual
Reproduction

Regeneration  1. Repair/ grow lost body
parts
 2. Left over cells divide to
make more cells
 3. Lobsters, starfish, lizards
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
What type of reproduction
is this??? Explain…
Asexual vs. Sexual
Mitosis

Mitosis

1. Cell division
 2. Causes multicellular
organisms to grow (even in
humans)
 3. Cells are identical to
parent cells (same DNA)
Mitosis

Phase 1Interphase
– Chromosomes
copied
– Cell resting
– Threadlike
chromatin (DNA
ball)
Mitosis

Phase 2- Prophase
– Mitosis begins
– Chromosomes are
rodlike pairs
– Centrioles move to
poles
– Spindle fibers
connect centrioles
Mitosis

Phase 3Metaphase
– Chromosomes
attach to spindle
fibers
– They line up in
middle of cell
Mitosis

Phase 4Anaphase
– Sister chromatids
pull apart
– One sister of each
pair goes to
opposite ends of
the cell
Mitosis

Phase 5Telophase
– 2 new nuclei form
– Chromosomes are
in a ball again
(chromatin)
Mitosis

Phase 6Cytokinesis
– Cytoplasm pinches
in to form 2 new
identical daughter
cells
Which phase of mitosis is
this? Explain…..
Which phase of mitosis is
this? Explain…..
Which phase of mitosis is
this? Explain…..
Which phase of mitosis is
this? Explain…..
Which phase of mitosis is
this? Explain…..
Which phase of mitosis is
this? Explain…..