Sexual vs. Asexual Reproduction

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Sexual vs. Asexual Reproduction
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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?

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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

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GOAL

• To compare forms of sexual and asexual
  reproduction
• To understand the process of mitosis

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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)

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Sexual Reproduction

• Sexual Reproduction

• 5. Examples
• Humans, some plants, mammals, fish, reptiles, etc.

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Sexual Reproduction
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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

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Types of Asexual Reproduction

• Binary Fission

• 1. Organism divides in half
• 2. 2 identical daughter cells produced
• 3. Daughter cells are half the parents size
• 4. Daughter cells grow, then divide too
• 5. In bacteria

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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

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Types of Asexual Reproduction

• Regeneration

• 1. Repair/ grow lost body parts
• 2. Left over cells divide to make more cells
• 3. Lobsters, starfish, lizards

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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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What type of reproduction is this??? Explain
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Asexual vs. Sexual
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Mitosis

• Mitosis

• 1. Cell division
• 2. Causes multicellular organisms to grow (even
  in humans)
• 3. Cells are identical to parent cells (same DNA)

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Mitosis

• Phase 1- Interphase
• Chromosomes copied
• Cell resting
• Threadlike chromatin (DNA ball)

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Mitosis

• Phase 2- Prophase
• Mitosis begins
• Chromosomes are rodlike pairs
• Centrioles move to poles
• Spindle fibers connect centrioles

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Mitosis

• Phase 3- Metaphase
• Chromosomes attach to spindle fibers
• They line up in middle of cell

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Mitosis

• Phase 4- Anaphase
• Sister chromatids pull apart
• One sister of each pair goes to opposite ends of
  the cell

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Mitosis

• Phase 5- Telophase
• 2 new nuclei form
• Chromosomes are in a ball again (chromatin)

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Mitosis

• Phase 6- Cytokinesis
• Cytoplasm pinches in to form 2 new identical
  daughter cells

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Which phase of mitosis is this? Explain..
Anaphase
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Which phase of mitosis is this? Explain..
Cytokinesis
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Which phase of mitosis is this? Explain..
Interphase
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Which phase of mitosis is this? Explain..
Metaphase
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Which phase of mitosis is this? Explain..
Prophase
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Which phase of mitosis is this? Explain..
Prophase