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Cards In This Set
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What is meiosis
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A special type of cell division necessary for sexual reproduction.
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What is the pupose of meiosis?
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The purpose of meiosis is to reduce the normal diploid cells (2 copies of each chromosome per cell) to haploid cells, called gametes (1 copy of each chromosome per cell). In humans, these special haploid cells resulting from meiosis are eggs (female) or sperm (male).
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Where does meiosis occur in the body?
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Sex organs
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What cells go through meiosis?
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Sex cells/gametes
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Cells of the body are either.....
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Prokaryotic or eukaryotic
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Gametogenesis in females
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Called oogenesis, formation of egg cells, in ovaries, oogonia (stem cell)à primary oocyte à secondary oocytà mature egg cell (ovum)
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Gametogenesis in males
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Called spertogenesis, formation of sperm, occurs in testes, spertogonia (stem cells)à create primary spermatocytesà secondary sprematocytesà spermatidsà sperm
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Interphase 1
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Nucleous visible, grows
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Prophase 1
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Chromosomes are in chromatids, each pair with chromosomes, crossing over occurs
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Metaphase 1
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Sister chromatid line up, spindle fibers attach to chromosomes
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Anaphase 1
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Sister chromatid line up, spindle fibers attach to chromosomes
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Telophase 1
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Sister chrom. At opposite poles, cell membrane pinches close
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Prophase 2
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No need to replicate DNA, rest, prepare for division, metaphase
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Metaphse 2
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Line up in middle of respected cells
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Anaphase 2
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Chromatids are broken, pulled towards opposite poles,
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