Cell Cycle and Cell Division · Biology · NEET

Given below are two statements:

Statement I: Failure of segregation of chromatids during cell cycle resulting in the gain or loss of whole set of chromosome in an organism is known as aneuploidy.

Statement II: Failure of cytokinesis after anaphase stage of cell division results in the gain or loss of a chromosome is called polyploidy.

In the light of the above statements, choose the correct answer from the options given below:

Recombination between homologous chromosomes is completed by the end of

Match List-I with List-II :

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Match List-I with List-II.

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Match List-I with List-II.

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Spindle fibers attach to kinetochores of chromosomes during

Given below are two statements:

Statement I : Chromosomes become gradually visible under light microscope during leptotene stage.

Statement II : The beginning of diplotene stage is recognized by dissolution of synaptonemal complex.

In the light of the above statements, choose the correct answer from the options given below:

Following are the stages of cell division :

A. Gap 2 phase

B. Cytokinesis

C. Synthesis phase

D. Karyokinesis

E. Gap 1 phase

Choose the correct sequence of stages from the options given below :

Match List I with List II :

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The dissolution of synaptonemal complex occurs during :

Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after :

During which stages of mitosis and meiosis, respectively does the centromere of each chromosome split ?

Which one of the following is the quiescent stage of cell cycle?

Select correct sequence of substages of Prophase-I of Meiotic division :

(A) Zygotene

(B) Pachytene

(C) Diakinesis

(D) Leptotene

(E) Diplotene

Choose the correct answer from the options given below :

The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?

Which of the following stages of meiosis involves division of centromere?

Among eukaryotes, replication of DNA takes place in :

Match List I with List II:

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Select the correct statements.

A. Tetrad formation is seen during Leptotene.

B. During Anaphase, the centromeres split and chromatids separate.

C. Terminalization takes place during Pachytene.

D. Nucleolus, Golgi complex and ER are reformed during Telophase.

E. Crossing over takes place between sister chromatids of homologous chromosome.

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Given below are two statements:

Statement I : During G₀ phase of cell cycle, the cell is metabolically inactive.

Statement II : The centrosome undergoes duplication during S phase of interphase.

In the light of the above statements, choose the most appropriate answer from the options given below:

Which stage of meiosis can last for months or years in the oocytes of some vertebrates?

Identify the correct sequence of events during Prophase I of meiosis:

(a) Synapsis of homologous chromosomes

(b) Chromosomes become gradually visible under microscope

(c) Crossing over between non-sister chromatids of homologous chromosomes

(d) Terminalisation of chiasmata

(e) Dissolution of synaptonemal complex

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Bivalent or Tetrad formation is a characteristic feature observed during

With respect to metaphase, which of the following statements is incorrect?

Which one of the following never occurs during mitotic cell division?

The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:

Match List I with List II.

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Regarding Meiosis, which of the statements is incorrect?

Select the incorrect statement with reference to mitosis :