asexual reproduction
DESCRIPTION
Asexual Reproduction. Mitosis. DSQ: Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals?. Mrs. Camp 7 th Grade Life Science. 1. Ready?. Begin!. 4:00. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/1.jpg)
1 1
Asexual ReproductionMitosis
DSQ: Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals?
Mrs. Camp
7th Grade Life Science
![Page 2: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/2.jpg)
How do little elephants grow up to be BIG elephants?
![Page 3: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/3.jpg)
Why do animals shed their skin?
![Page 4: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/4.jpg)
The process of asexual reproduction (cell life cycle) begins after a sperm fertilizes an
egg.
![Page 5: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/5.jpg)
Three reasons why cells reproduce by asexual reproduction:
1. Growth 2. Repair 3. ReplacementSkin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.
Cell that reproduce by asexual reproduction reproduce constantly.
![Page 6: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/6.jpg)
Animated Cell Life Cyclehttp://www.cellsalive.com/mitosis.htm
Cell Life Cycle Stages
• Interphase
• M1- Prophase
• M2- Metaphase
• M3- Anaphase
• M4- Telophase
• Cytokinesis
![Page 7: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/7.jpg)
Interphase occurs BEFORE mitosis begins
• Chromosomes and ALL organelles are copied.
• Chromosomes appear as threadlike coils (chromatin) at the start, but are almost invisible with a light microscope.
CELL MEMBRANENucleus
Cytoplasm
![Page 8: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/8.jpg)
InterphaseWhat differences do you see?
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
![Page 9: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/9.jpg)
M1- Prophase 1st step in Mitosis
• Mitosis begins. Chromosomes visible.• Centrioles (or poles) appear and begin to
move to opposite end of the cell. (Not in Plants)
• Spindle fibers form between the poles.Centrioles
Sister chromatids
Spindle fibers
![Page 10: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/10.jpg)
M1- ProphaseWhat differences do you see?
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Spindle fibers
![Page 11: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/11.jpg)
M2- Metaphase 2nd step in Mitosis
• Chromatids (or pairs of chromosomes) attach to the spindle fibers in middle of cell.
Centrioles
Spindle fibers
![Page 12: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/12.jpg)
M2- MetaphaseWhat differences do you see?
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
![Page 13: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/13.jpg)
M3- Anaphase 3rd step in Mitosis
• Chromatids (or pairs of chromosomes) separate and begin to move toward opposite ends of the cell.
Centrioles
Spindle fibers
![Page 14: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/14.jpg)
AnaphaseWhat differences do you see?
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
![Page 15: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/15.jpg)
Telophase 4th step in Mitosis
• Chromosomes are at across ends of cell.• Chromosomes appear as chromatin
(threads rather than rods).• Two new nuclei form• Mitosis ends.
NucleiNuclei
Chromatin
![Page 16: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/16.jpg)
TelophaseWhat differences do you see?
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
![Page 17: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/17.jpg)
Cytokinesisoccurs AFTER mitosis
• Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.
![Page 18: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/18.jpg)
Animal Cell Life Cycle - Review
Interphase
M1-Prophase
M2- Metaphase
M3- Anaphase
M4- Telophase
Cytokinesis
![Page 19: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/19.jpg)
Plant Cell Life Cycle -- ReviewInterphase
M1- Prophase
M2- Metaphase
M3- Anaphase
M4- Telophase
Cytokinesis Cell Wall Plate Forms
![Page 20: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/20.jpg)
21
Cell Life Cycle- Animal Cell
![Page 21: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/21.jpg)
22
- Cell DivisionThe Cell Cycle
22
![Page 22: Asexual Reproduction](https://reader033.vdocuments.net/reader033/viewer/2022051623/56815aa5550346895dc8359b/html5/thumbnails/22.jpg)
Cell Life Cycle Animation
http://www.cellsalive.com/mitosis.htm