Consider the given two statements:
I: | Morphology of chromosomes is best studied at metaphase |
II: | At this stage, a chromosome is made up of two sister chromatids, held together at the centromere |
1. Both I and II are True and II explains I
2. Both I and II are True but II does not explain I
3. I is True but II is False
4. I is False but II is True
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If a cell had 4[2 pairs] chromosomes at G1 phase, what would be the number of chromosomes in this cell at the end of anaphase?
1. | 2 | 2. | 4 |
3. | 6 | 4. | 8 |
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All the following key events take place during telophase of mitosis except:
1. Chromosomes cluster at the opposite spindle poles
2. Chromosomes become discrete
3. Nuclear envelope reforms
4. Nucleolus, ER and Golgi complex reform
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Identify the incorrect statement regarding cytokinesis:
1. | Animal cells divide by cleavage furrow |
2. | Cell plate formation takes place during cytokinesis in plant cells |
3. | The cell wall formation in plant cells starts near the existing lateral walls and grows inwards |
4. | At cytokinesis, mitochondria and plastids are distributed between daughter cells |
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Liquid endosperm in coconut forms due to:
1. Failure of cytokinesis after karyokinesis
2. Failure of karyokinesis before cytokinesis
3. Disruption of spindle fibers at metaphase
4. Continued DNA replication during cytokinesis
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At the metaphase plate:
1. | The sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the same pole |
2. | The non sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the same pole |
3. | The sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the opposite poles |
4. | The non sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the opposite poles |
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Which of the following cells is in transition to metaphase?
1 | 2. | ||
3. | 4. |
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The Mitotic [M] phase of a typical eukaryotic cell is divided into:
1. Two stages | 2. Three stages |
3. Four stages | 4. Five stages |
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During which stage of mitosis do the following events occur?
I. Centromeres split and chromatids separate
II. Chromatids move to opposite poles
1. | Prophase | 2. | Metaphase |
3. | Anaphase | 4. | Telophase |
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Match each item in Column I with one in Column II and select the correct answer from the codes given below:
Column I |
|
Column II |
|
A |
Zygotene |
a |
Pairing of homologous chromosomes |
B |
Pachytene |
b |
Appearance of chiasma |
C |
Diplotene |
c |
Terminalization of chiasma |
D |
Diakinesis |
d |
Crossing over |
Codes
A | B | C | D | |
1. | a | c | b | d |
2. | a | d | b | c |
3. | a | b | c | d |
4. | b | c | d | a |
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