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Select the corret matches (a) S-phase...

Select the corret matches
(a) S-phase - DNA replication
(b) Zygotene - Synapsis
(c) Diplotene - Crossing over
(d) Meiosis - Both haploid and diploid cells
`(e)`Gap 2 phase - Quiescent stage

A

A and B

B

C and D

C

C and E

D

A, C and E

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The correct Answer is:
A
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Mark incorrect statements :- (A) Meiosis involves only a single cycle of DNA replication (B) Four haploid cells are formed at the end of meiosis-I ( C ) Meiosis occurs in diploid cells (D) In yeast, cell cycle takes about 90 minutes.

What is not true about cell cycle ? a. During G_(1) phase there is active synthesis of RNA and proteins but no change in its DNA content b. In synthesis or S phases, each chromosome carriers a duplicate set of genes c. During G_(2) phase, a cell contains double the amount ($C) of DNA present in the original diploid cell (2C) d. In S-phase a cell doubles the original diploid (2n) chromosome number

Choose the correctly matched pairs and correct option (a) Leptotene - chromosomes become invisible (b) Zygotene - pairing of homologous chromosomes (c) Pachytene - Dissolution of synaptonemal complex takes place (d) Diplotene - Bivalent chromosomes appear as tetrads (e) Diakinesis - Terminalisation of chiasmata takes place

If we ignore the effect of crossing over, how many different haploid cells arise by meiosis in a diploid cell having 2n=12

Arrange the following events of meiosis in correct sequence : (a) Crossing over (b) Synapsis ( c ) Terminalisation of chaismata (d) Disappearance of nucleolus

Arrange the following events of meiosis in correct sequence (a) Crossing over (b) Synapsis (c) Terminalisation of chiasmata (d) Disappearance of nucleolus.

Arrange the following events of meiosis in correct sequence (A) Crossing over (B) Synapsis (C) Termilisation of chiasmata (D) Disappearance of nucleolus

Match the columns and choose the correct answer {:((p),"Mitosis",(i),"Occurs in diploid cells only",),(,,(ii),"Occurs in both haploid and diploid cells",),((q),"Meiosis",(iii),"Daughter and parent cells have same chromosome number",),(,,(iv),"Synapsis of homologous chromosomes",):}

Pick out the correct statements (A) Mitosis takes place in the somatic cells and meiosis takes place in the germ cells (B) During mitosis, the DNA replicates once for one cell division and in meiosis the DNA replicates twice for two cell divison (C) Mitosis and meiosis occur both in sexually and asexually reproducing organisms

NTA MOCK TESTS-NTA NEET SET 74-BIOLOGY
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