Name: __________________________________ Period: ____________________ Date: _____________
Biology Study Guide
Cell cycle, Binary Fission, Mitosis, & Meiosis
Critical Thinking
Be able to read, analyze, and give complete answers to questions like these.
Chromosomes
1. How many chromosomes are in a human body cell?
2. What makes up each chromosome?
3. Chromosomes can only be seen when a cell is
4. What holds chromatids together?
5. Sketch & label all parts of sister chromatids.
6. What is a karyotype?
7. Where are autosomes found on a karyotype?
8. Where are sex chromosomes found on a karyotype?
9. What is the genotype for males?
For females?
10. The presence of which chromosome determines the sex of the child?
Cell Reproduction
11. What is asexual reproduction?
12. Give 2 examples of asexual reproduction.
a.
b.
13. Which process produces identical new cells --- mitosis, meiosis, or both?
Biology Worksheets and Resources
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Page 1
Prokaryotic Cell Division
14. Name a prokaryote that reproduces by binary fission.
15. Sketch and explain how binary fission occurs in a bacterial cells.
Cell Cycle
16. Name the 5 phases of the cell cycle.
17. What is the longest phase of the cell cycle? Why?
18. Which phase has 3 stages & name them?
19. When is DNA copied?
20. Label all parts of the cell cycle.
Mitosis
21. In which type of cell does mitosis occur --- prokaryote or eukaryote? Explain why.
22. Name, in order, the four stages of mitosis.
23. What happens to chromosomes during metaphase?
24. What happens to sister chromatids during anaphase?
25. What process or phase follows telophase?
26. What divides during cytokinesis?
27. Explain how cytokinesis occurs in plants.
28. Explain how cytokinesis occurs in animals.
29. How does the chromosome number of the parent cell compare to that of the 2 daughter cells?
30. If the parent cell has a chromosome number of 2n = 6, what will be the chromosome number of the daughter cells?
31. Label these stages.
32. What happens if mitosis is NOT controlled?
Meiosis
33. Do chromosomes replicate or double before meiosis?
34. How many divisions occur in meiosis? Is this the same as mitosis? Explain. .
35. How many daughter cells can be produced by meiosis? Is this the same as mitosis? Explain.
36. What is the chromosome number of the daughter cells produced by meiosis? How does this compare to the number
of chromosomes in the original cell
37. What are the daughter cells called that are produced by meiosis? Name them.
38. In humans, how many chromosomes are in the original cells that undergoes meiosis?
39. After the second division, how many chromosomes are in the cells?
40. Is meiosis sexual or asexual reproduction?
41. Are eggs & sperm haploid or diploid?
42. What process joins the egg & sperm to restore the original chromosome number of the organism?
43. When a sperm fertilizes an egg, a new 2n cell forms called the
44. ___________________________ are pairs of sister chromatids that have the same genes, but may have different
alleles.
45. __________________ reduces the chromosome number by half, while fertilization restores it.
46. Name these stages of Meiosis I.
47. Name significant event occurs ONLY in Early Prophase I?
48. Crossing-over results in genetic _________________ in the offspring.
Gametogenesis
49. Gametogenesis that produces sperm cells is called
50. Gametogenesis that produces egg cells is called
51. How many haploid cells after oogenesis will become an egg cell?
Comparing Mitosis & Meiosis
52. Complete the following table comparing mitosis & meiosis.
Mitosis
Number of Divisions
Number of Daughter Cells
Genetically Identical
Chromosome Number
Where Occurs
Role
Disorders
53. What causes Down’s Syndrome?
Meiosis