Cell Cycle and Division Numericals Quiz
1. How many mitotic divisions are required to produce 64 cells from a single parent cell?
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Correct Answer: D (63)
Solution: The formula is (n - 1). Therefore, 64 - 1 = 63 divisions.
Solution: The formula is (n - 1). Therefore, 64 - 1 = 63 divisions.
2. If a single cell undergoes 4 mitotic divisions, how many daughter cells will be formed?
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Correct Answer: C (16)
Solution: Each mitotic division doubles the cells: 1 → 2 → 4 → 8 → 16.
Solution: Each mitotic division doubles the cells: 1 → 2 → 4 → 8 → 16.
3. How many mitotic divisions are required to produce 128 cells from a single cell?
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Correct Answer: C (127)
Solution: The formula is (n - 1). Therefore, 128 - 1 = 127 divisions.
Solution: The formula is (n - 1). Therefore, 128 - 1 = 127 divisions.
4. How many mitotic generations are needed to produce 32 cells from a single cell?
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Correct Answer: B (5)
Solution: Generations = number of times the cell population doubles. 25 = 32. So, 5 generations are needed.
Solution: Generations = number of times the cell population doubles. 25 = 32. So, 5 generations are needed.
5. If the DNA content of a cell in G1 phase is 2C, what will be the DNA content in G2 phase?
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Correct Answer: B (4C)
Solution: DNA duplicates during S phase before G2. So, 2C becomes 4C.
Solution: DNA duplicates during S phase before G2. So, 2C becomes 4C.
6. If a meiotic cell has 40 chromatids in metaphase I, what is the DNA content in G2 phase?
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Correct Answer: B (40C)
Solution: Chromatids in metaphase I = DNA content. So, 40 chromatids means 40C DNA in G2.
Solution: Chromatids in metaphase I = DNA content. So, 40 chromatids means 40C DNA in G2.
7. If the DNA content of a cell during G2 is 8 picograms, what will be its DNA content after meiosis II?
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Correct Answer: A (2 pg)
Solution: G2 = 8C. After meiosis I = 4C. After meiosis II = 2C.
Solution: G2 = 8C. After meiosis I = 4C. After meiosis II = 2C.
8. What will be the DNA content of a gamete if the DNA content of the G2 phase of its parent cell is 12 pg?
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Correct Answer: A (3 pg)
Solution: G2 = 12 pg. After meiosis I = 6 pg. After meiosis II = 3 pg.
Solution: G2 = 12 pg. After meiosis I = 6 pg. After meiosis II = 3 pg.
9. How many meiotic divisions are needed to form 400 functional gametes?
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Correct Answer: A (100)
Solution: 1 meiotic division produces 4 gametes. So, 400 ÷ 4 = 100 meiotic divisions.
Solution: 1 meiotic division produces 4 gametes. So, 400 ÷ 4 = 100 meiotic divisions.
10. How many meiotic divisions are required to form 200 male gametes in humans?
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Correct Answer: B (50)
Solution: 1 meiosis = 4 sperms. So, 200 ÷ 4 = 50 meiosis rounds.
Solution: 1 meiosis = 4 sperms. So, 200 ÷ 4 = 50 meiosis rounds.
11. How many meiotic divisions are required to produce 100 zygotes?
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Correct Answer: C (125)
Solution: Each zygote requires 1 male gamete + 1 female gamete.
For Males: 100 sperms require 100 ÷ 4 = 25 divisions.
For Females: 100 eggs require 100 divisions.
Total = 25 + 100 = 125 meiotic divisions.
Solution: Each zygote requires 1 male gamete + 1 female gamete.
For Males: 100 sperms require 100 ÷ 4 = 25 divisions.
For Females: 100 eggs require 100 divisions.
Total = 25 + 100 = 125 meiotic divisions.
12. Find the number of meiotic divisions needed to form 500 seeds in a flowering plant.
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Correct Answer: C (625)
Solution: Total divisions = (n/4) + n. Therefore, (500/4) + 500 = 125 + 500 = 625 meiotic divisions.
Solution: Total divisions = (n/4) + n. Therefore, (500/4) + 500 = 125 + 500 = 625 meiotic divisions.
13. How many meiotic divisions are required to form 80 pollen grains?
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Correct Answer: C (20)
Solution: 1 meiosis = 4 pollen grains. So, 80 ÷ 4 = 20 divisions.
Solution: 1 meiosis = 4 pollen grains. So, 80 ÷ 4 = 20 divisions.
14. How many mitotic generations are required to form an embryo with 128 cells from a zygote?
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Correct Answer: B (7)
Solution: 27 = 128. So, 7 mitotic generations are needed.
Solution: 27 = 128. So, 7 mitotic generations are needed.
15. What will be the DNA content of a cell at the end of meiosis I if its G2 content was 16C?
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Correct Answer: B (8C)
Solution: G2 = 16C. After meiosis I, the content halves to 8C (chromosome halves, chromatids intact).
Solution: G2 = 16C. After meiosis I, the content halves to 8C (chromosome halves, chromatids intact).
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