MITOSIS AND MEIOSIS

MITOSIS AND MEIOSIS - any other organism(Eukaryotes CELLS ARISE ONLY FROM PREEXISTING CELLS all cells come from cells cellular reproduction is

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UNIVERSITY OF ASIA AND THE PACIFIC   1 ST  SEMESTER COLLEGE OF ARTS AND SCIENCES BIOLOGY LECTURE (CAS 403) TOPIC: MITOSIS AND MEIOSIS MITOSIS– Diploid division 2 pairs of chromosomes (after fertilization) MEIOSIS – Haploid division 4 pairs of chromosomes (before fertilization) The life cycle of a multicellular organism includes: MORULA STAGE (mitosis) - Development/growth - Reproduction Gametes formation (sex cells) - formed during Mitosis - during sexual reproduction - sperm and egg - (haploid) Some organisms can reproduce asexually   - a star fish can regenerate if it lost its arm (mitosis) - regeneration results from repeated cell division CONNECTIONS BETWEEN CELL DIVISION AND REPRODUCTION - cell division is at the heart of the reproduction of cells and organisms - organisms can reproduce sexually or asexually (it can reproduce on its own with any help from 
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Unformatted text preview: any other organism(Eukaryotes) CELLS ARISE ONLY FROM PREEXISTING CELLS- all cells come from cells- cellular reproduction is called cell division *cell division allows an embryo to develop into an adult *it also ensures the continuity of life from one generation to the next CELL DIVISION IS A CONTINUUM OF DYNAMIC CHANGES- Eukaryotic cell division consists of two stages: *Mitosis *Cytokinesis *In mitosis , the duplicated chromosomes are distributed into 2 daughter nuclei -after the chromosomes coil up, a mitotic spindle moves them to the middle of the cell CHROMOSOMES- Chromosomes the unit that carries the genes- Gene carrying structure of a prokaryotic cell- Determine sex in many species At the moment of conception in humans, what determines the sex of the offspring?...
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This note was uploaded on 07/19/2011 for the course SC 101 taught by Professor David during the Fall '10 term at American Intl. University.

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MITOSIS AND MEIOSIS - any other organism(Eukaryotes CELLS ARISE ONLY FROM PREEXISTING CELLS all cells come from cells cellular reproduction is

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