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Sexual vs. Asexual Reproduction. By: 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?

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sexual vs asexual reproduction

Sexual vs. Asexual Reproduction

By:

Brianna Shields

October 19, 2004

do now hwk on desk
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
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
slide4
GOAL
  • To compare forms of sexual and asexual reproduction
  • To understand the process of mitosis
sexual reproduction
Sexual Reproduction

1. 2 parents

2. Sex cells: sperm and egg

3. Sperm and egg join= fertilization

4. Offspring look different from parent (mixed DNA)

Sexual Reproduction
sexual reproduction1
Sexual Reproduction

5. Examples

Humans, some plants, mammals, fish, reptiles, etc.

Sexual Reproduction
asexual reproduction
Asexual Reproduction

1. One parent

2. No sex cells

3. Offspring produced by cell division

4. Offspring identical to parent (same DNA)

5. Several types in plants and animals

Asexual Reproduction
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
types of asexual reproduction1
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
types of asexual reproduction2
Regeneration

1. Repair/ grow lost body parts

2. Left over cells divide to make more cells

3. Lobsters, starfish, lizards

Types of Asexual Reproduction
mitosis
Mitosis

1. Cell division

2. Causes multicellular organisms to grow (even in humans)

3. Cells are identical to parent cells (same DNA)

Mitosis
mitosis1
Phase 1- Interphase

Chromosomes copied

Cell resting

Threadlike chromatin (DNA ball)

Mitosis
mitosis2
Phase 2- Prophase

Mitosis begins

Chromosomes are rodlike pairs

Centrioles move to poles

Spindle fibers connect centrioles

Mitosis
mitosis3
Phase 3- Metaphase

Chromosomes attach to spindle fibers

They line up in middle of cell

Mitosis
mitosis4
Phase 4- Anaphase

Sister chromatids pull apart

One sister of each pair goes to opposite ends of the cell

Mitosis
mitosis5
Phase 5- Telophase

2 new nuclei form

Chromosomes are in a ball again (chromatin)

Mitosis
mitosis6
Phase 6- Cytokinesis

Cytoplasm pinches in to form 2 new identical daughter cells

Mitosis
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