'Cell divisions' diaporamas de présentation

Chapter 5

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Meiosis in Animals - Exercise 13

Meiosis in Animals - Exercise 13. Objectives -Understand meiosis and know where it occurs. -Know why meiosis is so important. -Be able to explain the phases of meiosis I & meiosis II. -Be able to show meiosis using peptides (simulation ) .

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How do you grow? Give examples and be specific.

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Cell Growth and Division

Cell Growth and Division. Cell Growth. Living things grow chiefly because of two things. 1. The number of cells increases. 2. The size of each individual cell increases. Number 1 is actually due to number 2!. Volume vs. Area.

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break

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Microbial Nutrition and Growth Microbial Population Growth

Microbial Nutrition and Growth Microbial Population Growth. Microbiology of the Health Sciences. The Study of Microbial Growth. Growth takes place on two levels Cell synthesizes new cell components and increases in size The number of cells in the population increases

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Warren Rosenberg, Ph.D.

Warren Rosenberg, Ph.D. Life Expectancy vs. Lifespan.

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Cell Growth and Division

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Announcements

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Fluid Mosaic Model

Fluid Mosaic Model. Phospholipid molecule. Passive Transport - requires NO cell energy. Passive Transport: (a) Simple Diffusion molecules move from high to low between phospholipid molecules.

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Meiosis - It's for Sexual Reproduction

Meiosis - It's for Sexual Reproduction. Stages of Mitosis and Meiosis. Prophase Metaphase Anaphase Telophase Interphase. There are two cell divisions. Mitosis has one division and meiosis has two divisions. R emember PMATI, but now do it twice.

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Cell Division 8.2 (p. 148-151)

Cell Division 8.2 (p. 148-151). Binary fission = prokaryotic cell (e.g. bacterium) splits into 2 identical cells Single, circular chromosome is copied Cell grows then divides into 2 identical cells (asexual). Cell Division 8.2 (p. 148-151).

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Recombinant DNA Technology & Cloning

LECTURE 3 :. Recombinant DNA Technology & Cloning. Biotechnology; 3 Credit hours Atta- ur - Rahman School of Applied Biosciences (ASAB) National University of Sciences and Technology (NUST). What are clones?. Clones

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Controversy 2

Controversy 2. Why Do Our Bodies Grow Old?. Why Do Our Bodies Grow Old?. The maximum human lifespan appears to be around 120 years We have no valid records of people living much beyond 120 years

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Controversy 2

Controversy 2. Why Do Our Bodies Grow Old?. Why Do Our Bodies Grow Old?. The maximum human lifespan appears to be around 120 years We have no valid records of people living much beyond 120 years

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Genetic applications

Genetic applications. Crossing over. What is crossing over? Is there an advantage to this?. Telomeres. What are they? Caps at the ends of chromosomes Scientists have determined that telomeres reduce in length each time a cell goes through the cell cycle and divides

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Meiosis

Meiosis. Gamete Production. Meiosis. Similar in many ways to mitosis Several differences however Involves 2 cell divisions Results in 4 cells with 1/2 the normal genetic information. Vocabulary: Diploid (2N) - Normal amount of genetic material

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Chapter 47 Quiz

Chapter 47 Quiz. Animal Development. Question #1. As an animal develops, organs form and the body transforms into a shape typical of the species, in a process called _____. A . cleavage B. c ell differentiation C. gastrulation D. morphogenesis. Question #2.

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Cancer, Aging and Telomeres

Cancer, Aging and Telomeres. How molecular genetic research contributes to a better understanding of cancer and aging in humans. What is cancer?. Cancer is the result of accelerated growth of undifferentiated cells Proto-oncogenes in cells regulate mitosis, cell growth and apoptosis

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Meiosis

Meiosis. Similar in many ways to mitosis Several differences however Involves 2 cell divisions Results in 4 cells with 1/2 the normal genetic information. Vocabulary: Diploid (2N) - Normal amount of genetic material Haploid (N) - 1/2 the genetic material.

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