Biology by Bradford
D2.1 Cell and nuclear division: grass skirts
22 quick questions on cell and nuclear division, 16 of them at standard level, each answered in a word or two. Print a sheet for each team, a key for the checker and a tick sheet, then tape the sheets to the board and race.
How it runs
- SnipA runner cuts one strip off the bottom of their team’s sheet.
- Answer as a pairBack at the table, they write the answer on the strip. No books.
- Get it checkedThe checker reads it against the key: you, or a student holding it.
- Back for the nextA tick earns the next strip. Wrong? Back to the table to try again.
The questions on this sheet
The checker’s key, with every answer, prints with the sheets.- Final split into two daughter cells
- Division making two identical nuclei
- Division that halves the chromosome number
- Joined identical copies of replicated DNA
- Stage when the nuclear membrane breaks up
- Stage when chromosomes line the equator
- Stage when copies move to opposite poles
- Stage when nuclear membranes re-form
- Pair: one from each parent, same genes
- Three copies of chromosome 21
- Growth period between two divisions
- Groove pinched in by actin and myosin
- Vesicle-built disc that splits plant cells
- Extra twisting that shortens chromatids
- Swapping DNA between non-sister chromatids
- Chance alignment of pairs at metaphase I
- Failure of chromosomes to separate
- Protein whose rise and fall paces division
- Mutated allele that pushes cells to divide
- Normally brakes division; cancer if lost
- Spread of cancer cells to new sites
- Ratio of dividing cells to all cells seen