'Daughter cells' diaporamas de présentation

Chapter 10

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Animal Science 434

Animal Science 434. Lecture 12: Spermatogenesis. Production of Fertile Sperm. hormonal regulation of the testis mitotic division of spermatogonia meiotic divisions of spermatocytes morphologic transformation of spermatids into spermatozoa. Hormonal Regulation of the Testis. LH. LH. LH.

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Mitosis Notes

Mitosis Notes. Cell Division. All cells are derived from pre-existing cells New cells are produced for growth and to replace damaged or old cells Differs in prokaryotes (bacteria ) and eukaryotes ( protists , fungi, plants, & animals). Keeping Cells Identical.

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Cell Reproduction or How cells make copies of themselves

Cell Reproduction or How cells make copies of themselves. Also called Cell Division. Cell Division. Cell division consists of two phases: 1. the division of the nucleus, and 2. the division of the cytoplasm (cytokinesis). 2 Kinds of Nuclear Division.

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The Cell Cycle and Cell Division

1. The Cell Cycle and Cell Division. What do you think?. Cell division produces two identical cells. Cell division is important for growth. At the end of the cell cycle, the original cell no longer exists. 1. The Cell Cycle and Cell Division. Do you agree or disagree?. 1.

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Development of the Human Embryo

Development of the Human Embryo. Developmental History of a Human. Stages of Development. 1. 2. 3. 4. 5. 6. 1. Fertilization. Fertilization. 3. 4. 5. 6. 2. Cleavage. 2. Cleavage. Begins ~ 12 hours post-fertilization Zygote divides into 2 cells (mitosis)

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The Great Divide

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KEY CONCEPT Cell cycle regulation is necessary for healthy growth.

KEY CONCEPT Cell cycle regulation is necessary for healthy growth. Internal and external factors regulate cell division. External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division.

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Where did I come from?

Where did I come from?. Asexual vs. Sexual Reproduction. What do we already know?. By now, you should be very familiar with mitosis!. Prophase. Metaphase. ? Do you remember what happens?. Anaphase. Telophase. ? For reproduction!. + the. What do we already know?.

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Do Now:

Do Now:. What is Mitosis? What are the phases of mitosis? How many chromosomes are in a human body (somatic) cell?. Sexual reproduction. How is sexual reproduction different from asexual reproduction?. Sexual Reproduction. Transfer of genetic material from one organism to another

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The Cell Cycle

The Cell Cycle. Mitosis Pg. 204- 210 in your book. Quick Facts About the Cell Cycle. The cell cycle is common to all living things It is a sequence of growth and division of a cell Two major periods of the cell cycle: I. Interphase II. Mitosis. Interphase.

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Diploid vs. haploid

Diploid vs. haploid. chromosomes one copy of each = one set N; 2N N varies greatly from species to species N constant w/in species Humans: 2N = 46 Hermit crab: 2N = 256 Ascaris: 2N = 2 Ophioglossum reticulatum: 2N = 1,260 (actually, N = 15; 84N). Diploidy vs. haploidy.

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CELL CYCLE AND

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Presentation created by T. Trimpe 2007 sciencespot/

DNA Keychains. Presentation created by T. Trimpe 2007 http://sciencespot.net/ Presentation was developed for use with DNA Jewelry lesson at http://accessexcellence.org/AE/AEC/AEF/1995/ross_jewelry.html Graphic from http://nanopedia.case.edu/image/dna.jpg.

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MITOSIS & CYTOKINESIS

MITOSIS & CYTOKINESIS. MITOSIS : The nucleus of a cell is divided into 2 nuclei with the same number & kinds of chromosomes as parent cell. CYTOKINESIS: The division of the cytoplasm into 2 distinct cells.

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Dinoflagellates

Dinoflagellates. By James Banks. Dinoflagellates. Pyrrhophyta is the phylum name of the dinoflagellates. About Dinoflagellates. 90% of all dinoflagellates are marine plankton. Although many of them are microscopic, the largest, Noctiluca, may be as large as 2 mm in diameter!.

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Structure and function of cell components

Structure and function of cell components. Carbohydrates Lipids Proteins Nucleic Acids Membranes Cytoskeleton. Structure of cytoskeleton. Cytoskeleton is found in all eukaryote cells It is anchored in the cell membrane via membrane proteins It is composed of 3 types of fibre.

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Stratum basale

Stratum basale. Close to the blood supply in the dermis Only stratum healthy enough to reproduce Daughter cells are pushed upward as more cells are produced . . . and eventually die. Stratum basale. Close to the blood supply in the dermis Only stratum healthy enough to reproduce

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