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25 Cards in this Set
- Front
- Back
Interphase
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period between one cell division and the next one
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Mitosis
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A nuclear division in which the chromosome number remains the same
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DNA Polymerase
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Breaks hydrogen bonds holding one base pair to another
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Semi Conservative Replication
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Allows you to conserve one of the two strands of DNA. Proposed in 1951 by Walter and Crick.
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Centromere
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Ties or holds together the two strands of DNA
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Prophase
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The first stage of mitosis where the condensation or compaction of chromosomes is the main event.
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Metaphase
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The second stage of mitosis where the chromosomes are lined up in the center of the spindle.
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Metaphase Plate
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Imaginary line in the middle of the mitotic spindle.
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Anaphase
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The third phase of mitosis that involves the movement of chromosomes towards each of the two poles. Ends when the chromosomes reach the poles.
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Telophase
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The fourth phase of mitosis. The nuclear envelope begins to reform and the mitotic spindle disappears. The cleavage furrow also forms.
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Cleavage Furrow
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Pinching in or constriction in the middle of the cell.
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Diploid Chromosome Number
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Two copies of each chromosome present. Production of sperm and egg begin with this type of cell
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Haploid Number of Chromosomes
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One copy of each chromosome is present.
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Meiosis
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The nuclear division that reduces chromosome number by one half.
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Prophase 1
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Stage in meiosis where mitotic spindles form and the nuclear envelope disppears
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Synapsis
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The pairing up of homologous chromosomes during Prophase 1 of meiosis
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Metaphase 1
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Stage in meiosis that aligns pairs of chromosomes but not individual chromosomes
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Anaphase 1
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Stage in meiosis where chromosomes move toward the poles
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Telophase 1
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Stage in meiosis where the chromosome number is 1/2 of what it started with and the chromosomes begin to reextend
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Prophase 2
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Stage in meiosis where the same events of Prophase 1 occur but with half the number of chromosomes
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Metaphase 2
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Stage in meiosis 2 where chromosomes align on the metaphase plate
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Anaphase 2
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Stage in meiosis 2 that begins with the splitting of centromeres
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Telophase 2
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Stage in meiosis 2 that begins when the chromosomes reach the poles.
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DNA synthesis is a(n)......... process
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enzyme catalyzed
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Cytokenisis in plant cells results in the formation of what structure?
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Cell Wall
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