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6 Cards in this Set
- Front
- Back
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Stages of Mitosis
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interphase- stage in which cells grow
prophase- nuclear membrane disintegrates, chromosomes condense, spindle fibers from and connect to chromosomes metaphase- chromosomes line up on cell equator anaphase- cell elongates, sister chromatid will split and move oward poles telophase- nuclear membrane is re-made, chromosome decondense, spindle fibers disconnect Cytokinesis: Division of cytoplasm |
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The Cell Cycle
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Interphase: stage cells are in most often
G1- Growrh S- Synthesis/ replication of DNA G2- Growth and organelle production Mitosis: 4 stages (PMAT) DNA must be replicated prior Purpose; growth, repair, replacement |
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Chromosome Anatomy
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Paired chromosomes are called homologous pairs.
They carry genes for the same trait in the same place on chromosome but the instructions can differ. |
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Chromosome Anatomy 2
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Each arm of DNA is a chromatid
The two chromatid are called sister chromatid They are genetically identical |
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Chromosome Anatomy 3
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Because we have 2 copies of all of our genes we are said to be diploid.
The diploid number is 2n, where n equals # of homologous pairs. What, hen, is the human diploid number? 46 |
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Chromosome 4
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DNA is wound around histones.
This DNA/histone structure is a nucleosome. These nucleosomes are then coiled together to form chromatn. Finally, this chromatin is supercoiled into a chormosome. |
