230889
Which of the following stages of meiosis involves division of centrornere?
1 Telophase
2 Metaphase I
3 Metaphase II
4 Anaphase II
Explanation:
D In anaphase II two sister chromosome of each pair start to move towards the opposite poles of the spindle, they are being drawn towards the opposite pole by their centromeres - Anaphase II is the third stage of meiosis II. - It occurs after metaphase II when the chromosome are in the equatorial plane. The spindle fibers are connected to the kinetochores. Anaphase II
[NEET (UG) 07.05.2023]
Cell cycle and Cell Division
230890
During Meiosis \(I\), in which stage synapsis takes place?
1 Leptotene
2 Pachytene
3 Zygotene
4 Diplotene
Explanation:
C In zygotene, the pairing of homologous chromosome starts a process known as chromosomal synapsis, A pair of synapsis homologous chromosome forms a complex known as bivalent or tetrad called synaptonemal complex. - At pachytene stage, crossing over of non-sister chromatids of homologous chromosomes occurs at the recombination nodules. The chromosome remains linked at the sites of crossing over. - Diplotene marks the dissolution of the synaptonemal complex and separation of the homologous chromosome of the bivalents except at the sites of cross-over. The \(\mathrm{x}\)-shaped structures formed during separation are known as chiasmata.
[NEET-2020 Phase-II NEET (Karnataka)-2013]
Cell cycle and Cell Division
230894
In meiosis division is:
1 \(\mathrm{I}^{\mathrm{st}}\) reductional and \(\mathrm{II}^{\mathrm{nd}}\) equational
2 \(\mathrm{I}^{\text {st }}\) equational and \(\mathrm{II}^{\text {nd }}\) reductional
3 both reductional
4 both equational
Explanation:
A Meiosis division occur in two stages Meiosis I- It is called the reductional division also called heterotypic division because it brings change from diploid to haploid stage \((2 n-n)\). Meiosis II- It is called equational division also called homotypic division means for maintaining haploid number (n).
[Haryana PMT-2005 \ JIPMER-2005 \ BHU PMT-2003]
Cell cycle and Cell Division
230896
Identify the correctly matched pair (s).
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
: - Chromonema - A localized condensed region of chromosome. - Non disjunction - The failure of chromosomes to be separated during meiosis or mitosis. - Master and slave - Lampbrush chromosome. - Chromocentre - Polytene chromosome hypothesis.
230889
Which of the following stages of meiosis involves division of centrornere?
1 Telophase
2 Metaphase I
3 Metaphase II
4 Anaphase II
Explanation:
D In anaphase II two sister chromosome of each pair start to move towards the opposite poles of the spindle, they are being drawn towards the opposite pole by their centromeres - Anaphase II is the third stage of meiosis II. - It occurs after metaphase II when the chromosome are in the equatorial plane. The spindle fibers are connected to the kinetochores. Anaphase II
[NEET (UG) 07.05.2023]
Cell cycle and Cell Division
230890
During Meiosis \(I\), in which stage synapsis takes place?
1 Leptotene
2 Pachytene
3 Zygotene
4 Diplotene
Explanation:
C In zygotene, the pairing of homologous chromosome starts a process known as chromosomal synapsis, A pair of synapsis homologous chromosome forms a complex known as bivalent or tetrad called synaptonemal complex. - At pachytene stage, crossing over of non-sister chromatids of homologous chromosomes occurs at the recombination nodules. The chromosome remains linked at the sites of crossing over. - Diplotene marks the dissolution of the synaptonemal complex and separation of the homologous chromosome of the bivalents except at the sites of cross-over. The \(\mathrm{x}\)-shaped structures formed during separation are known as chiasmata.
[NEET-2020 Phase-II NEET (Karnataka)-2013]
Cell cycle and Cell Division
230894
In meiosis division is:
1 \(\mathrm{I}^{\mathrm{st}}\) reductional and \(\mathrm{II}^{\mathrm{nd}}\) equational
2 \(\mathrm{I}^{\text {st }}\) equational and \(\mathrm{II}^{\text {nd }}\) reductional
3 both reductional
4 both equational
Explanation:
A Meiosis division occur in two stages Meiosis I- It is called the reductional division also called heterotypic division because it brings change from diploid to haploid stage \((2 n-n)\). Meiosis II- It is called equational division also called homotypic division means for maintaining haploid number (n).
[Haryana PMT-2005 \ JIPMER-2005 \ BHU PMT-2003]
Cell cycle and Cell Division
230896
Identify the correctly matched pair (s).
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
: - Chromonema - A localized condensed region of chromosome. - Non disjunction - The failure of chromosomes to be separated during meiosis or mitosis. - Master and slave - Lampbrush chromosome. - Chromocentre - Polytene chromosome hypothesis.
230889
Which of the following stages of meiosis involves division of centrornere?
1 Telophase
2 Metaphase I
3 Metaphase II
4 Anaphase II
Explanation:
D In anaphase II two sister chromosome of each pair start to move towards the opposite poles of the spindle, they are being drawn towards the opposite pole by their centromeres - Anaphase II is the third stage of meiosis II. - It occurs after metaphase II when the chromosome are in the equatorial plane. The spindle fibers are connected to the kinetochores. Anaphase II
[NEET (UG) 07.05.2023]
Cell cycle and Cell Division
230890
During Meiosis \(I\), in which stage synapsis takes place?
1 Leptotene
2 Pachytene
3 Zygotene
4 Diplotene
Explanation:
C In zygotene, the pairing of homologous chromosome starts a process known as chromosomal synapsis, A pair of synapsis homologous chromosome forms a complex known as bivalent or tetrad called synaptonemal complex. - At pachytene stage, crossing over of non-sister chromatids of homologous chromosomes occurs at the recombination nodules. The chromosome remains linked at the sites of crossing over. - Diplotene marks the dissolution of the synaptonemal complex and separation of the homologous chromosome of the bivalents except at the sites of cross-over. The \(\mathrm{x}\)-shaped structures formed during separation are known as chiasmata.
[NEET-2020 Phase-II NEET (Karnataka)-2013]
Cell cycle and Cell Division
230894
In meiosis division is:
1 \(\mathrm{I}^{\mathrm{st}}\) reductional and \(\mathrm{II}^{\mathrm{nd}}\) equational
2 \(\mathrm{I}^{\text {st }}\) equational and \(\mathrm{II}^{\text {nd }}\) reductional
3 both reductional
4 both equational
Explanation:
A Meiosis division occur in two stages Meiosis I- It is called the reductional division also called heterotypic division because it brings change from diploid to haploid stage \((2 n-n)\). Meiosis II- It is called equational division also called homotypic division means for maintaining haploid number (n).
[Haryana PMT-2005 \ JIPMER-2005 \ BHU PMT-2003]
Cell cycle and Cell Division
230896
Identify the correctly matched pair (s).
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
: - Chromonema - A localized condensed region of chromosome. - Non disjunction - The failure of chromosomes to be separated during meiosis or mitosis. - Master and slave - Lampbrush chromosome. - Chromocentre - Polytene chromosome hypothesis.
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Cell cycle and Cell Division
230889
Which of the following stages of meiosis involves division of centrornere?
1 Telophase
2 Metaphase I
3 Metaphase II
4 Anaphase II
Explanation:
D In anaphase II two sister chromosome of each pair start to move towards the opposite poles of the spindle, they are being drawn towards the opposite pole by their centromeres - Anaphase II is the third stage of meiosis II. - It occurs after metaphase II when the chromosome are in the equatorial plane. The spindle fibers are connected to the kinetochores. Anaphase II
[NEET (UG) 07.05.2023]
Cell cycle and Cell Division
230890
During Meiosis \(I\), in which stage synapsis takes place?
1 Leptotene
2 Pachytene
3 Zygotene
4 Diplotene
Explanation:
C In zygotene, the pairing of homologous chromosome starts a process known as chromosomal synapsis, A pair of synapsis homologous chromosome forms a complex known as bivalent or tetrad called synaptonemal complex. - At pachytene stage, crossing over of non-sister chromatids of homologous chromosomes occurs at the recombination nodules. The chromosome remains linked at the sites of crossing over. - Diplotene marks the dissolution of the synaptonemal complex and separation of the homologous chromosome of the bivalents except at the sites of cross-over. The \(\mathrm{x}\)-shaped structures formed during separation are known as chiasmata.
[NEET-2020 Phase-II NEET (Karnataka)-2013]
Cell cycle and Cell Division
230894
In meiosis division is:
1 \(\mathrm{I}^{\mathrm{st}}\) reductional and \(\mathrm{II}^{\mathrm{nd}}\) equational
2 \(\mathrm{I}^{\text {st }}\) equational and \(\mathrm{II}^{\text {nd }}\) reductional
3 both reductional
4 both equational
Explanation:
A Meiosis division occur in two stages Meiosis I- It is called the reductional division also called heterotypic division because it brings change from diploid to haploid stage \((2 n-n)\). Meiosis II- It is called equational division also called homotypic division means for maintaining haploid number (n).
[Haryana PMT-2005 \ JIPMER-2005 \ BHU PMT-2003]
Cell cycle and Cell Division
230896
Identify the correctly matched pair (s).
1 1,2 and 3 are correct
2 1 and 2 are correct
3 2 and 4 are correct
4 1 and 3 are correct
Explanation:
: - Chromonema - A localized condensed region of chromosome. - Non disjunction - The failure of chromosomes to be separated during meiosis or mitosis. - Master and slave - Lampbrush chromosome. - Chromocentre - Polytene chromosome hypothesis.
