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Cell Cycle And Cell Division

Question
CBSEENBI11025230
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Chromosomes replicate in which stage of meiosis?

  • Prophase- I

  • Prophase- II

  • Telophase- I

  • Interphase

Solution

D.

Interphase

Interphase is a phase of cell cycle where cell prepares itself for division. It consists of 3 phases: G1 phase, S phase and G2 phase.

During S or Synthesis phase, all the chromosomes get replicated. Each chromosome consists of two sister chromatids.

In eukaryotic DNA, histone and non- histone proteins are known as chromatin. It consists of thread- like structures known as chromosomes. Hence, the replication of DNA in the chromosomes initiates in S- phase of interphase.

Some More Questions From Cell Cycle and Cell Division Chapter

Name the process in which there is an exchange of genetic material between non-sister chromatids of homologous chromsomes during meiosis.

What is polyteny ?

 Namethe five phases of of Prophase I.

 What are two types of cells on the basis of presence or absence of nucleus ?

Name an important event that occurs during meiosis and not during mitosis.

Name a cell that has half the number of chromosomes. Name the process responsible for the reduced number.

Name the sub-stage of meiosis in which crossing over takes place.

At which stage of mitosis, the two chromatids of each chromosome separate and move towards opposite poles.

Name the cell division which is responsible for growth and healing of wounds.

What type of cell division can produce variations ?

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