Q. No.
Bivalent chromosomes clearly appear as tetrads during:
1. Zygotene
2. Pachytene
3. Diplotene
4. Diakinesis
The beginning of diplotene is recognized by :
| 1. | appearance of recombination nodules |
| 2. | Crossing over |
| 3. | Dissolution of synaptonemal complex |
| 4. | Appearance of chiasmata |
Consider the given two statements:
| I. | During G1 phase the cell is metabolically active and continuously grows but does not replicate its DNA. |
| II. | 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 |
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 |
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 |
At what phase of meiosis are homologous chromosomes separated ?
1. Prophase l
2. Prophase ll
3. Anaphase l
4. Anaphase ll
During meiosis, the sister chromatids separate during:
| 1. | Anaphase II |
| 2. | Anaphase I |
| 3. | The S phase |
| 4. | Synapsis |
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
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 |
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