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13 Cards in this Set
- Front
- Back
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Describe the composition of a chromosome.
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A linear array of genes
50% DNA 50% proteins |
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In a typical plant or animal, each cell has two versions of each chromosome. What are they called?
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homologous chromosomes
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Homologues are similar but not identical. Homologues carry variant forms of genes whic are called ______ .
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alleles
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Describe the mitotic phase.
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The part of the cell cycle when the nucleus is divided (via mitosis), its chromosomes are distributed to the daughter nuclei, and the cytoplasm divided (via cytokinesis), producing two daughter cells.
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Describe the stages of mitosis.
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What is the interphase stage in mitosis?
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The period of time when the cell is not dividing. Takes up 90% of the cell's life cycle.
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The _ stage of mitosis, during which the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still intact.
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first, prophase
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The _ stage of mitosis, during which the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids.
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second, prometaphase
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The _ stage of mitosis, during which all the cell's diplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle.
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third, metaphase
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The _ stage of mitosis, beginning when sister chromatids separate from eachother and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell.
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fourth, anaphase
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The _ stage of mitosis, during whic daughter nuclei form at the two poles of a cell. ___ usually occurs together with cytokinesis.
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fifth and final, telophase
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The division of the cytoplasm to form separate daughter cells. Usually occurs during the ____ stage.
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cytokinesis
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List the names of the stages in mitosis from first to last
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Interphase
Prophase Prometaphase Metaphase Anaphase Telophase |
