In animal cells
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Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei Slide number 1 In animal cells Nuclear envelope Centromere Chromosome Microtubules Centrosome Centriole Sister chromatids ) Prophase: (1) Chromosomes condense and become visible; (2) centrosomes move apart toward opposite poles and generate new microtubules; (3) nucleoli begin to disappear. Polar microtubules Astral microtubules Kinetochore microtubules Kinetochore (b) Prometaphase: (1) Nuclear envelope breaks down; (2) microtubules from the centrosomes invade the nucleus (3) sister chromatids attach to microtubules from opposi centrosomes. Metaphase plate etaphase: Chromosomes align on the metaphase plate with sister chromatids facing opposite poles. Nucleoli reappear Re-forming nuclear envelope Chromatin e) Telophase: (1) Nuclear membranes and nucleoli re-form; (2) spindle fibers disappear; (3) chromosomes uncoil and become a tangle of chromatin. (f) Cytokinesis: The cytoplasm divides, splitting the elonga parent cell into two daughter cells with identical nucl Separating sister chromatids (d) Anaphase: (1) Centromeres divide; (2) the now separated sister chromatids move to opposite poles.
description
Separating sister chromatids. Astral microtubules. Centriole. Metaphase plate. Kinetochore. Microtubules. Centrosome. Kinetochore microtubules. Re-forming nuclear envelope. Centromere. Chromosome. Polar microtubules. Sister chromatids. Nucleoli reappear. Chromatin. - PowerPoint PPT Presentation
Transcript of In animal cells
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 1In animal cells
Nuclear envelope
Centromere
Chromosome
Microtubules
Centrosome
Centriole
Sister chromatids
(a) Prophase: (1) Chromosomes condense and become visible; (2) centrosomes move apart toward opposite poles and generate new microtubules; (3) nucleoli begin to disappear.
Polar microtubules
Astral microtubules
Kinetochoremicrotubules
Kinetochore
(b) Prometaphase: (1) Nuclear envelope breaks down; (2) microtubules from the centrosomes invade the nucleus; (3) sister chromatids attach to microtubules from opposite centrosomes.
Metaphaseplate
(c) Metaphase: Chromosomes align on the metaphase plate with sister chromatids facing opposite poles.
Nucleoli reappear
Re-formingnuclear envelope
Chromatin
(e) Telophase: (1) Nuclear membranes and nucleoli re-form; (2) spindle fibers disappear; (3) chromosomes uncoil and become a tangle of chromatin.
(f) Cytokinesis: The cytoplasm divides, splitting the elongated parent cell into two daughter cells with identical nuclei.
Separating sisterchromatids
(d) Anaphase: (1) Centromeres divide; (2) the now separated sister chromatids move to opposite poles.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 2
In animal cells
Nuclear envelope
Chromosome
Centriole
(a) Prophase: (1) Chromosomes condense and become visible;
Sister chromatids
Centromere
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 3
In animal cells
Centromere
Chromosome
Microtubules
Centrosome
Centriole
(a) Prophase: (1) Chromosomes condense and become visible; (2) centrosomes move apart toward opposite poles and generate new microtubules;
Nuclear envelope
Sister chromatids
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 4
In animal cells
Centromere
Chromosome
Microtubules
Centrosome
Centriole
Sister chromatids
(a) Prophase: (1) Chromosomes condense and become visible; (2) centrosomes move apart toward opposite poles and generate new microtubules; (3) nucleoli begin to disappear.
Nuclear envelope
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 5
(b) Prometaphase: (1) Nuclear envelope breaks down;
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 6
Polar microtubules
Astral microtubules
Kinetochoremicrotubules
Kinetochore
(b) Prometaphase: (1) Nuclear envelope breaks down; (2) microtubules from the centrosomes invade the nucleus;
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 7
Polar microtubules
Astral microtubules
Kinetochoremicrotubules
Kinetochore
(b) Prometaphase: (1) Nuclear envelope breaks down; (2) microtubules from the centrosomes invade the nucleus; (3) sister chromatids attach to microtubules from opposite centrosomes.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 8
Metaphaseplate
(c) Metaphase: Chromosomes align on the metaphase plate with sister chromatids facing opposite poles.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 9
(d) Anaphase: (1) Centromeres divide;
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 10
Separating sisterchromatids
(d) Anaphase: (1) Centromeres divide; (2) the now separated sister chromatids move to opposite poles.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 11
(e) Telophase: (1) Nuclear membranes and nucleoli re-form;
Nucleoli reappear
Re-formingnuclear envelope
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 12
Re-formingnuclear envelope
(e) Telophase: (1) Nuclear membranes and nucleoli re-form; (2) spindle fibers disappear;
Nucleoli reappear
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 13
Re-formingnuclear envelope
Chromatin
(e) Telophase: (1) Nuclear membranes and nucleoli re-form; (2) spindle fibers disappear; (3) chromosomes uncoil and become a tangle of chromatin.
Nucleoli reappear
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
4.8 Mitosis maintains the chromosome number of the parent cell nucleus in the two daughter nuclei
Slide number 14
(f) Cytokinesis: The cytoplasm divides, splitting the elongated parent cell into two daughter cells with identical nuclei.
