Q) Describe the behaviour of chromosomes during mitosis
Main points | |
Key idea: | Prophase |
·Chrom duplicate; indistinct chromatin condense to form visible double struc ·Chrom join to spindle fibres (that extend fr opp poles of the cell) ·Ref to attachment of spindle to centromere of each chrom (via kinetochore) + starts to move it toward equator of cell | |
Key idea: | Metaphase |
·Chrom aligned along metaphase plate | |
Key idea: | Anaphase |
·Centromere of each chrom divides & spindle shorten ·Separation of sis chromatids of each chrom (pulled toward opp poles of cell) ·Ref to each separated sis chromatid as a chrom | |
Key idea: | Telophase |
·Chrom reach opp poles ·Uncoil & lengthen (decondense) ·Ref to formation of thread-like indistinct chromatin | |
Comments: (i) Visualize the answer with the aid of a labelled diagram. (ii) Verbalize the answer + write down the main points w/o referring to the answer (use abbreviations) (iii) Read again within the next 24h & once more within 72h (do not spend more than 10min) (iv) Do not describe the behaviour of other non-chromosomal structures (e.g. centrioles, nuclear membrane, etc). This wastes time since no marks will be awarded. Read the question again and know what it is asking for. | |
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