Conditions of Use
Q1:Cells divide/multiply using a lot of steps. First the chromosome splits into two identical chromosomes. Next the genetic material in the nucleus of the cell begins to thicken
& shorten. The chromosome copies are held together at the center. Then line up at the center of the cell. Then the copies separate, and each copy of the chromosomes are moved to either side of the cell towards each nuclei.
Q2:Interphase- this is the stage were the cromosomes are preparing to divid. The cell is very active where the the DNA replicates, and the protiens are being made.
Prophase- In the first stage of mitosis, the nucleous starts to fadel and proteins and chromotain, condenses into the chromosomes. Each has two chromatids, they have the same gennetic onfo.
Preprphase- The nuclear membrane disintegrates, and microtubules have invaded the nuclear space. These microtubules can attach to kinetochores or they can interact with opposing microtubules.
Metaphase-The chromosomes align at the metaphase plate.
Anaphase: The chromosomes split and the kinetochore microtubules shorten.
Telophase: The daughter chromosomes arrive at the poles and the spindle fibers that have pulled them apart disappear.
Cytokinesis: the spindle fibers that are not connected to that cromosomes they make it so only that one is overlapping.
Q3:Alike- Both mitosis and meiosis are nuclear division. Different- Meiosis ONLY involved in reproduction cell/gametes while mitosis involves in somatic cells. Mitosis will produce 2 daughter cells with SAME chromosomal number (2n/diploid) as the parent cell while in meiosis, 4 daughter cells will be produced with half of the chromosomal number of parent cell. Mitosis - (prophase,metaphase,anaphase,telophase)
Meiosis - (prophase 1, metaphase 1, anaphase 1, telophase 1, prophase 2, metaphase 2, anaphase 2, telophase 2).
Article posted January 26, 2012 at 02:18 PM •
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