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17 Cards in this Set
- Front
- Back
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Mitosis |
The nuclear division that produces two nuclei contain chromosomes identical to the parental nucleus, begins at the end of the G2 phase. |
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Significance of mitosis |
Assures that the chromosome number is preserved when one eukaryotic cell divides to form two. Identical chromosomes are distributed to each pole of the cell, and a nuclear envelope forms around each set. |
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Prophase in mitosis |
The structure of duplicated chromosomes becomes apparent as the chromatin condenses; each is composed of a pair of identical sister chromatid. The nuclear envelope begins to disassemble, and the miotic spindle begins to form |
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Prometaphase in mitosis |
Spindle microtubules attached to kinetichores of chromosomes, and chromosomes begin to move toward the cells midplane |
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Metaphase in mitosis |
The chromosomes are aligned on cells midplane, or metaphase plate; the miotic spindle is complete, and the kinetochores of the sister chromatids are attached by microtubules to opposite poles of the cell |
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Anaphase in mitosis |
The sister chromatids separate and move to opposite poles. Each former chromatid is now a chromosome. |
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Telophase in mitosis |
I nuclear envelope reforms around each set of chromosomes, nucleoli become A parent, the chromosomes uncoil, and the spindle disappears. Cytokinesis generally begins Now. |
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Significance of chromosomes |
In eukaryotes, DNA associates with protein to form the chromatin fibers that make up... |
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DNA in chromosomes |
Allows the DNA to be accurately replicated and sorted into daughter cells without tangling. |
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Histones |
DNA is associated with this basic protein to form nucleosome’s, each of which consist of a histone bead with a DNA wrapped around it |
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Nucleosome‘s |
Are organized into large, loops held together by non-histone scaffolding proteins. |
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Chromosome in dividing cell cell |
Well-defined, it is one chain of DNA |
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Chromatin in nondividing cell |
Structure of chromosome, the combination of the DNA and proteins that give the structure |
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Chromatid |
An individual copy of a chromosome |
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Centromere |
Each chromatid include a constricted region called a.... |
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Kinetochore |
A protein structure to which microtubules can bind. Attached to each centromere |
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Karyotype |
Chromosome composition |
