$A$: $DNA$ replication occurs only once in meiosis.
$R$: Exchange of $DNA$ in chromosomes is seen in mitosis.
$R$: Exchange of $DNA$ in chromosomes is seen in mitosis.
- A$A$ is correct and $R$ is incorrect.
- B$A$ and $R$ both are incorrect.
- C$A$ and $R$ both are correct.
- D$A$ is incorrect and $R$ is correct.
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Arrange these events of mitosis in their correct sequence:
$a -$ Nuclear envelope assembles around chromosome clusters.
$b -$ Spindle fibers attach to kinetochores of chromosomes.
$c -$ Condensation of chromosomes.
$d -$ Centromeres split and chromatids separate.
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$c -$ Condensation of chromosomes.
$d -$ Centromeres split and chromatids separate.
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