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24 Cards in this Set
- Front
- Back
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What is meiosis?
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It is the process by which chromosomes are reduced by half
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What is the reduction division?
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Meiosis
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What is equation division?
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Mitosis
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What is a somatic cell?
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A cell that does NOT produce gametes and does NOT undergo meiosis
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What is a germinative cell?
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A cell that undergoes meiosis and produces gametes
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What are homologous chromosomes?
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When, in a somatic cell, the chromosomes occur in matched pairs
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What happens during First interphase in meiosis?
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Genetic material form in chromatin
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What happens during First Prophase in meiosis?
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Chromatin condenses, homologous chromosomes undero synapsis (four chromatids = tetrad),centrioles duplicate and migrate to poles of the cell, spindle fibers begin to appear, and nuclear membrane disappears
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What happens during First Metaphase?
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Tetrads line up on the equatorial plane
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What happens during First Anaphase?
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Tetrads split apart
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What happens during the First Telophase?
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Each pole has the haploid number of replicated chromosomes. Cytokinesis occurs
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What happens during Second Interphase?
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It does NOT occur. Interkinesis occurs and no DNA replication occurs
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What happens during Second Prophase?
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Centrioles duplicate and divide and new spindle fibers appear, at a right angle to the first set
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What happens during Second Metaphase?
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The chromosomes line up on the equatorial plane of the new cells and the centromeres divide
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What happens during Second Telophase?
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Cytokinesis, new nuclear membranes appear, and chromosomes elongate and become chromatin
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Cells in the diploid organism undergo...?
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Meiosis
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Haploid cells formed are...?
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Meiospores
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The diploid plant that produces them is the...?
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Sporophyte
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What are female meiopores called?
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Megaspores
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What are male meiospores called?
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Microspores
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What are gametophytes?
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Multicellular haploid plants produced from megaspores and microspores
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Male gametophytes produce...?
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Sperm cells
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Female gametophytes produce...?
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Egg cells
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The egg cell and sperm cell fuse (syngamy) to form...?
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The zygote
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