LAB THREE Mitosis and Meiosis

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LAB THREE Mitosis and Meiosis
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LAB THREE Mitosis and Meiosis

• 3A.1 Observing Mitosis
• 3A.2 Time for Cell Replication
• 3B.1 Simulation of Meiosis
• 3B.2 Crossing Over During Meiosis

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LAB THREE Mitosis and Meiosis
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LAB THREE Mitosis and Meiosis
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LAB THREE Mitosis and Meiosis
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LAB THREE Mitosis and Meiosis
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LAB THREE Mitosis and Meiosis
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LAB THREE Mitosis and Meiosis
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LAB THREE Mitosis and Meiosis
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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria

Number of 44 Number of Asci Showing Crossover Total Asci Asci Showing Crossover Divided by 2 Gene to Centromere Distance (map units)

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• Why do we divide the by 2?

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• Crossing over happened between these two
  chromatids

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• Crossing over happened between these two
  chromatids
• but not between these two

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• Crossing over happened between these two
  chromatids
• but not between these two
• so it only happened ½ the time.

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• A map unit is equal to the of time that
  crossover happens between two genes or between a
  gene and the centromere.

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• Map units show us relative distances between genes

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• Map units show us relative distances between
  genes.
• They do not translate directly into numbers of
  nucleotide pairs

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• Map units show us relative distances between
  genes.
• They do not translate directly into numbers of
  nucleotide pairs.
• Genes that are more than 50 map units apart
  assort independently

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LAB THREE Mitosis and Meiosis

• EXERCISE 3B.2 Crossing over during Meiosis in
  Sordaria
• Map units show us relative distances between
  genes.
• They do not translate directly into numbers of
  nucleotide pairs.
• Genes that are more than 50 map units apart
  assort independently and might as well be on
  separate chromosomes.

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• .