How Cells Divide Chapter 9-10. Cell Division growth and repair reproduction.

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Presentation transcript:

How Cells Divide Chapter 9-10

Cell Division *growth and repair *reproduction

Cell Division *divide contents of cell *replicate genetic information 2 parts:

Cell Division parent cell daughter cells

Prokaryotic cells Binary Fission

1. Replicate the genetic material 2. Divide the cell

Cell Division Eukaryotic Cells

Chromosomes

Cell Division 1. Replicate the genetic material 2. Divide the cell

Mitosis *growth and repair Eukaryotic Cells

Meiosis *production of gametes Eukaryotic Cells

Cell Cycle

Interphase Division (meiosis or mitosis)

Mitosis Inter- phase

Human chromosomes

23 pairs of chromosomes 46 chromosomes haploid number diploid number

Human chromosomes 23 pairs 46 chromosomes Homologous pair

Homologous chromosomes One from the egg One from the sperm

Homologous chromosomes

Replicated chromosomes

Interphase

Prophase

Metaphase

Anaphase

Telophase

Cytokinesis

Cytokinesis in an animal cell

Cancer Cells

Meiosis and Sexual Cycles

Asexual reproduction

Sexual Reproduction

Meiosis aka: reduction division 2n n

Meiosis aka: reduction division 2n n Gamete formation

Meiosis *replicate chromosomes *two cell division phases

Meiosis ONE (1) 2n cell FOUR (4) n cells

Meiosis I

Prophase Imetaphase IAnaphase I

Meiosis I telophase I

Meiosis I

Prophase I *Crossing over (= synapsis)

Meiosis I Prophase I *Crossing over (= synapsis)

Meiosis II

Prophase II metaphase IIAnaphase II

Meiosis II telophase IIcytokinesis

Meiosis II

Meiosis Start: diploid (2n) End: haploid (1n)

Meiosis

Mitosis