Cell Reproduction Flashcards
Compare mitosis and meiosis - type of cells, function, number of nuclear divisions, number of daughter cells, number of chromosomes in parent cell, number of chromosomes in daughter cells, is there variation of daughter cells, how many PMAT’s.
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Outline and describe the phases of mitosis.
Interphase- DNA is replicating in the nucleus, looks like nothing is happening.
Prophase- nuclear membrane breaks down, nucleolus disappears. Centrioles migrate to opposite sides, spindle threads start to form. DNA appears as chromosomes.
Metaphase- chromosomes line up on equatorial line, spindle fibres attach to them.
Anaphase- spindles pull chromosomes apart, pulled towards opposite ends of the cell.
Telophase- chromosomes form groups at opposite ends of the cell, nuclear membrane forms around them. Nucleolus reappears, spindle fibres disappear.
Cytokinesis- cell splits into two daughter cells.
Observe and label diagrams, put phases in order.
Check notes.
What is the significance of meiosis in the production of gametes for sexual reproduction?
Meiosis is important because it makes sure that each gamete has the correct number of chromosomes, and can get rid of genetic defects. It also produces genetic variation.
