230897
At which phase of meiosis, the two cells, each with separated sister chromatids move towards opposite poles:
1 metaphase I
2 metaphase II
3 anaphase I
4 anaphase II
Explanation:
D There are two division occur in the process of meiosis. Meiosis I- Reductional division - The separation of homologous chromosome occur. Meiosis II- Equational division - Daughter cell have same number of chromosome as the parent cell enter in meiosis II. In this division centromere of chromosome splits, sister chromatid move towards opposite pole during Anaphase II.
[Punjab MET-2004
Cell cycle and Cell Division
230908
Select the correct option with respect to mitosis.
1 Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
2 Chromatids separate but remain in the centre of the cell in anaphase
3 Chromatids start moving towards opposite poles in telophase
4 Golgi complex and endoplasmic reticulum are still visible at the end of prophase
Explanation:
A During the mitosis - four phase - Prophase, Metaphase, Anaphase, Telophase. Mitosis is the process by which a single cell is divided into two identical daughter cells by the process of cell division. Mitosis is also referred to as the repairment and regeneration of body structures like in starfish. In many organisms, mitosis is the method of asexual reproduction. The character of metaphase is spindle fibers attach to kinetochores of chromosomes.
[AIPMT (Screening)-2011]
Cell cycle and Cell Division
230909
The behaviour of the chromosomes was parallel to the behaviour of genes during meiosis was noted by
1 Correns
2 Tschermark
3 Sutton and Boveri
4 Henking
5 De Vries
Explanation:
C Sutton \& Boveri - Chromosomal theory of inheritance was proposed by-Sutton and Boveri in 1902. Similarties in the behavior of chromosomes \& genes are occur in pairs. Hugo De Vries (1901-03) - Dutch botanist and geneticist was given by mutation theory. Henking - German cytologist who discovered the ' \(\mathrm{X}\) ' chromosome in 1890.
[Kerala PMT-2012]
Cell cycle and Cell Division
230910
The enzyme recombinase is required at which stage of meiosis.
1 Pachytene
2 Zygotene
3 Diplotene
4 Diakinesis
Explanation:
: Crossing over is an enzymatic process occurring during the pachytene state of prophase I. It is an enzyme that catalyzes the cutting and rejoining of DNA. This process cuts one strand of DNA at a time and then joins them with another piece of DNA that has been cut from a different parent molecule. It is the point in meiosis when the homologous chromosomes have completely synapsed and are now called bivalents. The bivalents are held together by a series of proteins that form a structure called the synaptonemal complex.
[AIPMT-2014]
Cell cycle and Cell Division
230913
Crossing over occurs during
1 leptotene
2 diplotene
3 pachytene
4 zygotene
Explanation:
C Pachytene - The pair of chromosomes becomes twisted cannot be distinguished separately. As a consequence of synapsis the number of observable chromosome is half of somatic chromosome number. Crossing over take place in this phase. Zygotene - Chromosomes become shorter and thicker. Diplotene - Bivalents repel each other. Chiasmata (sites of crossing over)
230897
At which phase of meiosis, the two cells, each with separated sister chromatids move towards opposite poles:
1 metaphase I
2 metaphase II
3 anaphase I
4 anaphase II
Explanation:
D There are two division occur in the process of meiosis. Meiosis I- Reductional division - The separation of homologous chromosome occur. Meiosis II- Equational division - Daughter cell have same number of chromosome as the parent cell enter in meiosis II. In this division centromere of chromosome splits, sister chromatid move towards opposite pole during Anaphase II.
[Punjab MET-2004
Cell cycle and Cell Division
230908
Select the correct option with respect to mitosis.
1 Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
2 Chromatids separate but remain in the centre of the cell in anaphase
3 Chromatids start moving towards opposite poles in telophase
4 Golgi complex and endoplasmic reticulum are still visible at the end of prophase
Explanation:
A During the mitosis - four phase - Prophase, Metaphase, Anaphase, Telophase. Mitosis is the process by which a single cell is divided into two identical daughter cells by the process of cell division. Mitosis is also referred to as the repairment and regeneration of body structures like in starfish. In many organisms, mitosis is the method of asexual reproduction. The character of metaphase is spindle fibers attach to kinetochores of chromosomes.
[AIPMT (Screening)-2011]
Cell cycle and Cell Division
230909
The behaviour of the chromosomes was parallel to the behaviour of genes during meiosis was noted by
1 Correns
2 Tschermark
3 Sutton and Boveri
4 Henking
5 De Vries
Explanation:
C Sutton \& Boveri - Chromosomal theory of inheritance was proposed by-Sutton and Boveri in 1902. Similarties in the behavior of chromosomes \& genes are occur in pairs. Hugo De Vries (1901-03) - Dutch botanist and geneticist was given by mutation theory. Henking - German cytologist who discovered the ' \(\mathrm{X}\) ' chromosome in 1890.
[Kerala PMT-2012]
Cell cycle and Cell Division
230910
The enzyme recombinase is required at which stage of meiosis.
1 Pachytene
2 Zygotene
3 Diplotene
4 Diakinesis
Explanation:
: Crossing over is an enzymatic process occurring during the pachytene state of prophase I. It is an enzyme that catalyzes the cutting and rejoining of DNA. This process cuts one strand of DNA at a time and then joins them with another piece of DNA that has been cut from a different parent molecule. It is the point in meiosis when the homologous chromosomes have completely synapsed and are now called bivalents. The bivalents are held together by a series of proteins that form a structure called the synaptonemal complex.
[AIPMT-2014]
Cell cycle and Cell Division
230913
Crossing over occurs during
1 leptotene
2 diplotene
3 pachytene
4 zygotene
Explanation:
C Pachytene - The pair of chromosomes becomes twisted cannot be distinguished separately. As a consequence of synapsis the number of observable chromosome is half of somatic chromosome number. Crossing over take place in this phase. Zygotene - Chromosomes become shorter and thicker. Diplotene - Bivalents repel each other. Chiasmata (sites of crossing over)
230897
At which phase of meiosis, the two cells, each with separated sister chromatids move towards opposite poles:
1 metaphase I
2 metaphase II
3 anaphase I
4 anaphase II
Explanation:
D There are two division occur in the process of meiosis. Meiosis I- Reductional division - The separation of homologous chromosome occur. Meiosis II- Equational division - Daughter cell have same number of chromosome as the parent cell enter in meiosis II. In this division centromere of chromosome splits, sister chromatid move towards opposite pole during Anaphase II.
[Punjab MET-2004
Cell cycle and Cell Division
230908
Select the correct option with respect to mitosis.
1 Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
2 Chromatids separate but remain in the centre of the cell in anaphase
3 Chromatids start moving towards opposite poles in telophase
4 Golgi complex and endoplasmic reticulum are still visible at the end of prophase
Explanation:
A During the mitosis - four phase - Prophase, Metaphase, Anaphase, Telophase. Mitosis is the process by which a single cell is divided into two identical daughter cells by the process of cell division. Mitosis is also referred to as the repairment and regeneration of body structures like in starfish. In many organisms, mitosis is the method of asexual reproduction. The character of metaphase is spindle fibers attach to kinetochores of chromosomes.
[AIPMT (Screening)-2011]
Cell cycle and Cell Division
230909
The behaviour of the chromosomes was parallel to the behaviour of genes during meiosis was noted by
1 Correns
2 Tschermark
3 Sutton and Boveri
4 Henking
5 De Vries
Explanation:
C Sutton \& Boveri - Chromosomal theory of inheritance was proposed by-Sutton and Boveri in 1902. Similarties in the behavior of chromosomes \& genes are occur in pairs. Hugo De Vries (1901-03) - Dutch botanist and geneticist was given by mutation theory. Henking - German cytologist who discovered the ' \(\mathrm{X}\) ' chromosome in 1890.
[Kerala PMT-2012]
Cell cycle and Cell Division
230910
The enzyme recombinase is required at which stage of meiosis.
1 Pachytene
2 Zygotene
3 Diplotene
4 Diakinesis
Explanation:
: Crossing over is an enzymatic process occurring during the pachytene state of prophase I. It is an enzyme that catalyzes the cutting and rejoining of DNA. This process cuts one strand of DNA at a time and then joins them with another piece of DNA that has been cut from a different parent molecule. It is the point in meiosis when the homologous chromosomes have completely synapsed and are now called bivalents. The bivalents are held together by a series of proteins that form a structure called the synaptonemal complex.
[AIPMT-2014]
Cell cycle and Cell Division
230913
Crossing over occurs during
1 leptotene
2 diplotene
3 pachytene
4 zygotene
Explanation:
C Pachytene - The pair of chromosomes becomes twisted cannot be distinguished separately. As a consequence of synapsis the number of observable chromosome is half of somatic chromosome number. Crossing over take place in this phase. Zygotene - Chromosomes become shorter and thicker. Diplotene - Bivalents repel each other. Chiasmata (sites of crossing over)
230897
At which phase of meiosis, the two cells, each with separated sister chromatids move towards opposite poles:
1 metaphase I
2 metaphase II
3 anaphase I
4 anaphase II
Explanation:
D There are two division occur in the process of meiosis. Meiosis I- Reductional division - The separation of homologous chromosome occur. Meiosis II- Equational division - Daughter cell have same number of chromosome as the parent cell enter in meiosis II. In this division centromere of chromosome splits, sister chromatid move towards opposite pole during Anaphase II.
[Punjab MET-2004
Cell cycle and Cell Division
230908
Select the correct option with respect to mitosis.
1 Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
2 Chromatids separate but remain in the centre of the cell in anaphase
3 Chromatids start moving towards opposite poles in telophase
4 Golgi complex and endoplasmic reticulum are still visible at the end of prophase
Explanation:
A During the mitosis - four phase - Prophase, Metaphase, Anaphase, Telophase. Mitosis is the process by which a single cell is divided into two identical daughter cells by the process of cell division. Mitosis is also referred to as the repairment and regeneration of body structures like in starfish. In many organisms, mitosis is the method of asexual reproduction. The character of metaphase is spindle fibers attach to kinetochores of chromosomes.
[AIPMT (Screening)-2011]
Cell cycle and Cell Division
230909
The behaviour of the chromosomes was parallel to the behaviour of genes during meiosis was noted by
1 Correns
2 Tschermark
3 Sutton and Boveri
4 Henking
5 De Vries
Explanation:
C Sutton \& Boveri - Chromosomal theory of inheritance was proposed by-Sutton and Boveri in 1902. Similarties in the behavior of chromosomes \& genes are occur in pairs. Hugo De Vries (1901-03) - Dutch botanist and geneticist was given by mutation theory. Henking - German cytologist who discovered the ' \(\mathrm{X}\) ' chromosome in 1890.
[Kerala PMT-2012]
Cell cycle and Cell Division
230910
The enzyme recombinase is required at which stage of meiosis.
1 Pachytene
2 Zygotene
3 Diplotene
4 Diakinesis
Explanation:
: Crossing over is an enzymatic process occurring during the pachytene state of prophase I. It is an enzyme that catalyzes the cutting and rejoining of DNA. This process cuts one strand of DNA at a time and then joins them with another piece of DNA that has been cut from a different parent molecule. It is the point in meiosis when the homologous chromosomes have completely synapsed and are now called bivalents. The bivalents are held together by a series of proteins that form a structure called the synaptonemal complex.
[AIPMT-2014]
Cell cycle and Cell Division
230913
Crossing over occurs during
1 leptotene
2 diplotene
3 pachytene
4 zygotene
Explanation:
C Pachytene - The pair of chromosomes becomes twisted cannot be distinguished separately. As a consequence of synapsis the number of observable chromosome is half of somatic chromosome number. Crossing over take place in this phase. Zygotene - Chromosomes become shorter and thicker. Diplotene - Bivalents repel each other. Chiasmata (sites of crossing over)
230897
At which phase of meiosis, the two cells, each with separated sister chromatids move towards opposite poles:
1 metaphase I
2 metaphase II
3 anaphase I
4 anaphase II
Explanation:
D There are two division occur in the process of meiosis. Meiosis I- Reductional division - The separation of homologous chromosome occur. Meiosis II- Equational division - Daughter cell have same number of chromosome as the parent cell enter in meiosis II. In this division centromere of chromosome splits, sister chromatid move towards opposite pole during Anaphase II.
[Punjab MET-2004
Cell cycle and Cell Division
230908
Select the correct option with respect to mitosis.
1 Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
2 Chromatids separate but remain in the centre of the cell in anaphase
3 Chromatids start moving towards opposite poles in telophase
4 Golgi complex and endoplasmic reticulum are still visible at the end of prophase
Explanation:
A During the mitosis - four phase - Prophase, Metaphase, Anaphase, Telophase. Mitosis is the process by which a single cell is divided into two identical daughter cells by the process of cell division. Mitosis is also referred to as the repairment and regeneration of body structures like in starfish. In many organisms, mitosis is the method of asexual reproduction. The character of metaphase is spindle fibers attach to kinetochores of chromosomes.
[AIPMT (Screening)-2011]
Cell cycle and Cell Division
230909
The behaviour of the chromosomes was parallel to the behaviour of genes during meiosis was noted by
1 Correns
2 Tschermark
3 Sutton and Boveri
4 Henking
5 De Vries
Explanation:
C Sutton \& Boveri - Chromosomal theory of inheritance was proposed by-Sutton and Boveri in 1902. Similarties in the behavior of chromosomes \& genes are occur in pairs. Hugo De Vries (1901-03) - Dutch botanist and geneticist was given by mutation theory. Henking - German cytologist who discovered the ' \(\mathrm{X}\) ' chromosome in 1890.
[Kerala PMT-2012]
Cell cycle and Cell Division
230910
The enzyme recombinase is required at which stage of meiosis.
1 Pachytene
2 Zygotene
3 Diplotene
4 Diakinesis
Explanation:
: Crossing over is an enzymatic process occurring during the pachytene state of prophase I. It is an enzyme that catalyzes the cutting and rejoining of DNA. This process cuts one strand of DNA at a time and then joins them with another piece of DNA that has been cut from a different parent molecule. It is the point in meiosis when the homologous chromosomes have completely synapsed and are now called bivalents. The bivalents are held together by a series of proteins that form a structure called the synaptonemal complex.
[AIPMT-2014]
Cell cycle and Cell Division
230913
Crossing over occurs during
1 leptotene
2 diplotene
3 pachytene
4 zygotene
Explanation:
C Pachytene - The pair of chromosomes becomes twisted cannot be distinguished separately. As a consequence of synapsis the number of observable chromosome is half of somatic chromosome number. Crossing over take place in this phase. Zygotene - Chromosomes become shorter and thicker. Diplotene - Bivalents repel each other. Chiasmata (sites of crossing over)
