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Pick up the correct statement : (a) Sy...

Pick up the correct statement :
(a) Synapsis of homologous chromosomes occurs during prophase I
(b) Division of centromeres takes place during anaphase I
`(c)`Spindle fibres disappear completely in telophase of mitosis
(d) Nucleoli may reappear in telophase I

A

a only

B

c only

C

a and b only

D

a, c and d only

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze each statement provided and determine which one(s) are correct regarding the cell cycle and cell division. ### Step-by-Step Solution: 1. **Statement (a): Synapsis of homologous chromosomes occurs during prophase I.** - **Analysis:** Synapsis refers to the pairing of homologous chromosomes. This process indeed occurs during prophase I of meiosis, specifically in the zygotene stage. Therefore, this statement is **correct**. 2. **Statement (b): Division of centromeres takes place during anaphase I.** - **Analysis:** The division of centromeres occurs during anaphase II of meiosis and during anaphase of mitosis, not during anaphase I. In anaphase I, homologous chromosomes are separated, but the centromeres remain intact. Thus, this statement is **incorrect**. 3. **Statement (c): Spindle fibres disappear completely in telophase of mitosis.** - **Analysis:** During telophase of mitosis, the spindle fibers do indeed disappear as the cell prepares to divide into two daughter cells. Therefore, this statement is **correct**. 4. **Statement (d): Nucleoli may reappear in telophase I.** - **Analysis:** During telophase I of meiosis, the nucleoli can reappear as the cell prepares for the next phase. This statement is also **correct**. ### Conclusion: The correct statements are: - (a) Synapsis of homologous chromosomes occurs during prophase I. - (c) Spindle fibres disappear completely in telophase of mitosis. - (d) Nucleoli may reappear in telophase I. Thus, the correct answer includes statements (a), (c), and (d). ### Final Answer: The correct statements are (a), (c), and (d). ---
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