WAEC 2021 Biology · Question 14
Which of the following statements about mitosis is not correct?
Options
- A.chiasmata are not formed
- B.Bi-valents are not formed
- C.It does not lead to variation
- D.Four daughter cells are produced
Answer: D. Four daughter cells are produced
Explanation written with AI and checked against the answer key
Analyze the question: We need the statement about mitosis that is NOT correct (the false one).
Concept: Mitosis is cell division that produces two genetically identical diploid daughter cells, used for growth, repair and asexual reproduction. Meiosis, by contrast, produces four genetically different haploid cells and involves pairing of homologous chromosomes.
Checking each option:
- A. Chiasmata are not formed: TRUE. Chiasmata form during prophase I of meiosis when homologous chromosomes cross over. Homologous chromosomes do not pair in mitosis, so there are no chiasmata.
- B. Bivalents are not formed: TRUE. Bivalents (paired homologous chromosomes) occur only in meiosis.
- C. It does not lead to variation: TRUE. The daughter cells are genetically identical to the parent cell, since there is no crossing over or independent assortment.
- D. Four daughter cells are produced: FALSE. Mitosis produces two daughter cells, not four. Four cells are produced in meiosis.
Tip: Remember "Mitosis = Two, Meiosis = Many (four)". Chiasmata, bivalents, crossing over and variation all point to meiosis. For "not correct" questions, find the statement that describes meiosis but is attributed to mitosis.
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