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Mitosis Genetics 26404/36404

Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

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Page 1: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

MitosisGenetics 26404/36404

Page 2: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

CellCell Membrane

Cytoplasm

Nucleus

Nuclear Membrane

Nucleolus

Centriole

Page 3: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Plant Cellcell wall

Page 4: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Chromosomes

• dark staining body

• composed of DNA and protein

• visible when cell divides

Page 5: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Chromosome Structure

Centromere

Chromatids

Replicated Chromosome

Page 6: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

• Any cell has N different chromosomes.

• Haploid - one set (N)

• Diploid - two sets (2N)

Chromosome Number

N=2

2N=4

• Homologous chromosomes - pairs

Page 7: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

• Cell division producing 2 daughter cells identical to parent cell.

2N14

2N14

2N14

N7

N7

N7

Mitosis

Page 8: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Cell Cyclemitosis

Interphase

G1G2

S

Page 9: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Interphase G12N=4

Page 10: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Interphase S and G2

Page 11: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Prophase

•Nuclear membrane disappears•Nucleolus disappears•DNA condenses into chromosomes•Centriole divides & moves to opposite side

Page 12: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Metaphase

•Chromosomes in line•Attach to spindles

Page 13: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Anaphase

•Chromosomes move to opposite sides

Page 14: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Telophase

•New nucleus forms•Nucleoli form•DNA uncoils•Cytokinesis occurs

Page 15: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Interphase

Page 16: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Plant Mitosis

Page 17: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Interphase G1

Aa

Aa

Page 18: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Interphase S and G2

Aa

Aa

Page 19: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Prophase

•Nuclear membrane disappears•Nucleoli disappear•DNA condenses into chromosomes•Centrioles divide & separate

A aA a

Page 20: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Metaphase

•Chromosomes in line•Attach to spindles

a

AA

a

Page 21: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Anaphase

•Chromosomes move to opposite sides

a

A A

a

Page 22: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Telophase

•New nucleus forms•Nucleoli form•DNA uncoils•Cytokinesis occurs

aA aA

Page 23: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

Interphase

Aa Aa

Page 24: Mitosis - University of Rio Grande · •Any cell has N different chromosomes. • Haploid - one set (N) •Diploid - two sets (2N) Chromosome Number N=2 2N=4 •Homologous chromosomes

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