Worksheetscell repro
Total questions: 15
Worksheet time: 8mins
After cell division, two daughter cells have the wrong number of chromosomes. One has one extra, and the other has one less. In which phase of mitosis did this likely happen?
metaphase
anaphase
Mitosis is the process by which a cell's nucleus divides to form two nuclei. Which statement correctly describes mitosis?
Mitosis creates two cells genetically identical to the parent cell.
Mitosis controls cell functions for new cell development.
During which phase of mitosis do chromosomes reach opposite poles and nuclear membranes reform?
telophase
anaphase
Chip and Dale have the same parents but look different. Which factor best explains their genetic differences?
The crossing over and independent assortment of genetic information during meiosis I.
The exchange of genetic information between homologous chromosomes during anaphase I and independent assortment during prophase II.
A scientist observes onion root tip cells and records the percentage of cells in each phase of the cell cycle over a 24-hour period:
Interphase: 61%
Prophase: 13%
Metaphase: 4%
Anaphase: 2%
Telophase: 13%
Cytokinesis: 7%
Which inference can be made from this data?
There are more cells undergoing prophase than telophase because cells need more time to break down the nuclear envelope and condense the genetic information.
Cells spend most of their time in interphase because cells need time to grow, copy their DNA, and prepare for division.
What is occurring in Stage IV?
Prophase II: two daughter cells have formed and are preparing for cell division.
Telophase I: the sister chromatids have separated and are preparing for independent assortment.
What is the difference between how body cells and sex cells divide?
Body cells divide by mitosis for growth and repair, while sex cells divide by meiosis for reproduction.
Body cells divide by meiosis for reproduction, while sex cells divide by mitosis for growth and repair.
Which treatment would be more effective in treating cancer (uncontrolled cell division)
A compound (drug) that keeps the cell in the G2 phase
A compound (drug) that reduced time spent in M phase
true/false: Mitosis undergoes cell division only once, while meiosis undergoes cell division twice.
true
false
Place these events in order as they occur in the cell cycle: 1) Cytokinesis 2) Chromosomes align 3) DNA is copied 4) Spindle fibers form
3-4-2-1
4-3-2-1
What process is described by the image?
Interphase, because the diagram shows a duplication of the genetic material
Crossing over, because the diagram shows the formation of a new combination of alleles
How is Meiosis I and Meiosis II different?
During meiosis I, crossing over in prophase I allows for the random exchange of genetic material, while the process of meiosis II does not include crossing over
During meiosis II, crossing over in prophase II allows for the random exchange of genetic material, while the process of meiosis I does not include crossing over
What phase of the cell cycle does the cell grows and all cellular contents, except the chromosomes, are duplicated.
S
G1
What phase of the cell cycle does cancer effect the most?
M phase (because of the uncontrolled cell division)
G1 phase (because of the growth)
What is a constant in an experiment?
Keeping non-changed conditions the same in a experiment.
leaving one group untreated
