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24 Cards in this Set
- Front
- Back
Genome |
A cells set of genetic information |
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Functions of cell division |
Reproduction, Growth and Development, Tissue Renewal |
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Chromosome |
One DNA molecule with accompanying proteins (very long) |
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Chromatin |
The complex of DNA and proteins that make up chromosomes (including dispersed yarn-ball form) |
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Somatic cells |
Non sex cells -- any cell in multi-called organisms that is not an egg or sperm cell |
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Gametes |
Sex cells; egg and sperm cells. Have half as many chromosomes as somatic |
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Mitotic (m) phase |
Includes mitosis and cytokenesis -- the splitting apart. |
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Shortest part of cell cycle |
M Phase |
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Interphase |
About 90% of the cell cycle divided into G1, S, and G2 phases |
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What happens in interphase |
Proteins and organelles are made |
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G1 phase |
First gap, growth |
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S Phase |
Synthesis -- duplication of chromosomes |
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G2 Phase |
Second gap, completes growth and preparation for cell division |
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Centrosome |
The microtubule organizing center during cell division where microtubule a form and also mitotic spindle |
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Centromere |
Major region (of proteins) where 2 sister chromatids are joined |
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Kinetochore |
Attachment site where each sister chromatid is linked to the mitotic spindle |
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Cell plate |
Flattened sac where the new cell wall forms during cytokinesis |
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5 parts of mitosis |
Prophase, prometaphase, metaphase, anaphase, telophase |
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What happens to the centrosomes in g2 |
They become active |
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How many chromosomes do somatic cells have |
46 |
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How many chromosomes do gametes have |
23 |
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What are chromosomes like before cell division |
Long, thin chromatin fibers |
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What are chromosomes like after cell division |
Densely coiled and folded so they are short and thick |
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Explain the anatomy of the chromosome |
Two sister chromatids attached by cohesins known as sister chromatid cohesion. Each sister chromatid has a centromere. |