The beginning of diplotene is recognized by :

1. appearance of recombination nodules
2. Crossing over
3. Dissolution of synaptonemal complex
4. Appearance of chiasmata

Subtopic:  Cell Cycle: Meiosis I |
 78%
From NCERT
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Consider the given two statements:

l. During G1 phase the cell is metabolically active and continuously grows but does not replicate its DNA.

ll. During G2 phase, proteins are synthesized in preparation for mitosis while cell growth continues.

Of the two statements:
1. Only l is correct
2. Only ll is correct
3. Both l and ll are correct
4. Both l and ll are incorrect 

Subtopic:  Intro to Cell Cycle & Interphase |
 93%
From NCERT
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If the DNA content of an onion tip cell is 2C at the end of M phase, what would be its DNA content at the end of S phase?

(1) C

(2) 2C

(3) 3C

(4) 4C

Subtopic:  Intro to Cell Cycle & Interphase |
 85%
From NCERT
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In oocyte of some vertebrates, the stage of meiosis I that can last for months or years would be:

(1) Zygotene

(2) Pachytene

(3) Diplotene

(4) Diakinesis

Subtopic:  Cell Cycle: Meiosis I |
 83%
From NCERT
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At what phase of meiosis are homologous chromosomes separated ?

1. Prophase l
2. Prophase ll
3. Anaphase l
4. Anaphase ll

Subtopic:  Cell Cycle: Meiosis I |
 76%
From NCERT
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During meiosis, the sister chromatids separate during:

(1) Anaphase II    

(2) Anaphase I     

(3) The S phase    

(4) Synapsis

Subtopic:  Cell Cycle: Meiosis II |
 80%
From NCERT
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During meiosis I in human, one of the daughter cells receives:

(1) Only maternal chromosomes

(2) A mixture of maternal and paternal chromosomes

(3) The same number of chromosomes as a diploid cell

(4) A sister chromatid from each chromosome

Subtopic:  Cell Cycle: Meiosis I |
 65%
From NCERT
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Chromosomes decondense into diffuse chromatin:

(1) At the end of telophase                

(2) At the beginning of prophase

(3) At the end of interphase              

(4) At the end of metaphase

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 80%
From NCERT
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The total DNA content of each daughter cell is reduced during meiosis because:

(1) Chromosomes do not replicate during the interphase preceding meiosis I

(2) Chromosomes do not replicate between meiosis I and II

(3) Half of the chromosomes from each gamete are lost during fertilization

(4) Chromosome arms are lost during crossing over

Subtopic:  Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
 61%
From NCERT
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Which of the following does not occur during mitotic prophase?

(1) Disappearance of the nuclear envelope

(2) Chromosome condensation

(3) Migration of centrosomes towards the cell poles

(4) Synapsis of homologous chromosomes

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 82%
From NCERT
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