230964
The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?
1 Prophase-I, prophase-II
2 Metaphase-I, anaphase-II
3 Anaphase-I, anaphase-II
4 Anaphase-I, telophase-II
Explanation:
C In anaphase I, segregation of chromosomes occurs. And during anaphase II, chromosomes break from the centromere, when non-segregation occurs, there is failure in the segregation of chromosomes and this results in the formation of gametes with fewer or more chromosomes.
[JIPMER-2015]
Cell cycle and Cell Division
230966
During gamete formation, the enzyme recombinase participates during:
1 Prophase-I
2 Prophase-II
3 Metaphase-I
4 Anaphase-II
Explanation:
A During gamete formation, the enzyme recombinase participates during prophase \(-\mathrm{I}\) of meiosis. Enzyme recombines observed during the pachytene stage where in enzyme recombinase helps in recombination of genes between homologous chromosome.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230967
Activity of ligase enzyme is found in
1 Leptotene
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
Ligase enzyme is involved in the process of DNA recombination, which occurs during the pachytene stage of meiosis. Ligase is responsible for sealing the DNA breaks that are created during recombination
[AP EAMCET-2010]
Cell cycle and Cell Division
230969
When paternal and maternal chromosomes change their materials with each other in cell division this event is called :
1 synapsis
2 crossing over
3 bivalent-forming
4 dyad-forming
Explanation:
B Crossing over is reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologous chromosome. It leads to recombination of genes present on two homologus chromosomes. Synapsis - It is the pairing of two homologous chromosome that occurs during meiosis. It is also called as synapsis.
[JIPMER-2003]
Cell cycle and Cell Division
230972
Variation in character are brought about by;
1 duplication of chromosomes during mitosis
2 mutations
3 crossing over during meiosis
4 both (b) and (c)
Explanation:
D Genotypic variation are occurs due to the difference in number or structure of chromosomes or by difference in the genes carried out by the chromosomes. This is called mutation. Crossing over is also responsible for variation by the exchange of chromosomal material during meiosis. Due to mitosis genetically identical daughter cells produces so it is not responsible for variation.
230964
The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?
1 Prophase-I, prophase-II
2 Metaphase-I, anaphase-II
3 Anaphase-I, anaphase-II
4 Anaphase-I, telophase-II
Explanation:
C In anaphase I, segregation of chromosomes occurs. And during anaphase II, chromosomes break from the centromere, when non-segregation occurs, there is failure in the segregation of chromosomes and this results in the formation of gametes with fewer or more chromosomes.
[JIPMER-2015]
Cell cycle and Cell Division
230966
During gamete formation, the enzyme recombinase participates during:
1 Prophase-I
2 Prophase-II
3 Metaphase-I
4 Anaphase-II
Explanation:
A During gamete formation, the enzyme recombinase participates during prophase \(-\mathrm{I}\) of meiosis. Enzyme recombines observed during the pachytene stage where in enzyme recombinase helps in recombination of genes between homologous chromosome.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230967
Activity of ligase enzyme is found in
1 Leptotene
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
Ligase enzyme is involved in the process of DNA recombination, which occurs during the pachytene stage of meiosis. Ligase is responsible for sealing the DNA breaks that are created during recombination
[AP EAMCET-2010]
Cell cycle and Cell Division
230969
When paternal and maternal chromosomes change their materials with each other in cell division this event is called :
1 synapsis
2 crossing over
3 bivalent-forming
4 dyad-forming
Explanation:
B Crossing over is reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologous chromosome. It leads to recombination of genes present on two homologus chromosomes. Synapsis - It is the pairing of two homologous chromosome that occurs during meiosis. It is also called as synapsis.
[JIPMER-2003]
Cell cycle and Cell Division
230972
Variation in character are brought about by;
1 duplication of chromosomes during mitosis
2 mutations
3 crossing over during meiosis
4 both (b) and (c)
Explanation:
D Genotypic variation are occurs due to the difference in number or structure of chromosomes or by difference in the genes carried out by the chromosomes. This is called mutation. Crossing over is also responsible for variation by the exchange of chromosomal material during meiosis. Due to mitosis genetically identical daughter cells produces so it is not responsible for variation.
230964
The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?
1 Prophase-I, prophase-II
2 Metaphase-I, anaphase-II
3 Anaphase-I, anaphase-II
4 Anaphase-I, telophase-II
Explanation:
C In anaphase I, segregation of chromosomes occurs. And during anaphase II, chromosomes break from the centromere, when non-segregation occurs, there is failure in the segregation of chromosomes and this results in the formation of gametes with fewer or more chromosomes.
[JIPMER-2015]
Cell cycle and Cell Division
230966
During gamete formation, the enzyme recombinase participates during:
1 Prophase-I
2 Prophase-II
3 Metaphase-I
4 Anaphase-II
Explanation:
A During gamete formation, the enzyme recombinase participates during prophase \(-\mathrm{I}\) of meiosis. Enzyme recombines observed during the pachytene stage where in enzyme recombinase helps in recombination of genes between homologous chromosome.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230967
Activity of ligase enzyme is found in
1 Leptotene
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
Ligase enzyme is involved in the process of DNA recombination, which occurs during the pachytene stage of meiosis. Ligase is responsible for sealing the DNA breaks that are created during recombination
[AP EAMCET-2010]
Cell cycle and Cell Division
230969
When paternal and maternal chromosomes change their materials with each other in cell division this event is called :
1 synapsis
2 crossing over
3 bivalent-forming
4 dyad-forming
Explanation:
B Crossing over is reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologous chromosome. It leads to recombination of genes present on two homologus chromosomes. Synapsis - It is the pairing of two homologous chromosome that occurs during meiosis. It is also called as synapsis.
[JIPMER-2003]
Cell cycle and Cell Division
230972
Variation in character are brought about by;
1 duplication of chromosomes during mitosis
2 mutations
3 crossing over during meiosis
4 both (b) and (c)
Explanation:
D Genotypic variation are occurs due to the difference in number or structure of chromosomes or by difference in the genes carried out by the chromosomes. This is called mutation. Crossing over is also responsible for variation by the exchange of chromosomal material during meiosis. Due to mitosis genetically identical daughter cells produces so it is not responsible for variation.
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Cell cycle and Cell Division
230964
The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?
1 Prophase-I, prophase-II
2 Metaphase-I, anaphase-II
3 Anaphase-I, anaphase-II
4 Anaphase-I, telophase-II
Explanation:
C In anaphase I, segregation of chromosomes occurs. And during anaphase II, chromosomes break from the centromere, when non-segregation occurs, there is failure in the segregation of chromosomes and this results in the formation of gametes with fewer or more chromosomes.
[JIPMER-2015]
Cell cycle and Cell Division
230966
During gamete formation, the enzyme recombinase participates during:
1 Prophase-I
2 Prophase-II
3 Metaphase-I
4 Anaphase-II
Explanation:
A During gamete formation, the enzyme recombinase participates during prophase \(-\mathrm{I}\) of meiosis. Enzyme recombines observed during the pachytene stage where in enzyme recombinase helps in recombination of genes between homologous chromosome.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230967
Activity of ligase enzyme is found in
1 Leptotene
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
Ligase enzyme is involved in the process of DNA recombination, which occurs during the pachytene stage of meiosis. Ligase is responsible for sealing the DNA breaks that are created during recombination
[AP EAMCET-2010]
Cell cycle and Cell Division
230969
When paternal and maternal chromosomes change their materials with each other in cell division this event is called :
1 synapsis
2 crossing over
3 bivalent-forming
4 dyad-forming
Explanation:
B Crossing over is reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologous chromosome. It leads to recombination of genes present on two homologus chromosomes. Synapsis - It is the pairing of two homologous chromosome that occurs during meiosis. It is also called as synapsis.
[JIPMER-2003]
Cell cycle and Cell Division
230972
Variation in character are brought about by;
1 duplication of chromosomes during mitosis
2 mutations
3 crossing over during meiosis
4 both (b) and (c)
Explanation:
D Genotypic variation are occurs due to the difference in number or structure of chromosomes or by difference in the genes carried out by the chromosomes. This is called mutation. Crossing over is also responsible for variation by the exchange of chromosomal material during meiosis. Due to mitosis genetically identical daughter cells produces so it is not responsible for variation.
230964
The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?
1 Prophase-I, prophase-II
2 Metaphase-I, anaphase-II
3 Anaphase-I, anaphase-II
4 Anaphase-I, telophase-II
Explanation:
C In anaphase I, segregation of chromosomes occurs. And during anaphase II, chromosomes break from the centromere, when non-segregation occurs, there is failure in the segregation of chromosomes and this results in the formation of gametes with fewer or more chromosomes.
[JIPMER-2015]
Cell cycle and Cell Division
230966
During gamete formation, the enzyme recombinase participates during:
1 Prophase-I
2 Prophase-II
3 Metaphase-I
4 Anaphase-II
Explanation:
A During gamete formation, the enzyme recombinase participates during prophase \(-\mathrm{I}\) of meiosis. Enzyme recombines observed during the pachytene stage where in enzyme recombinase helps in recombination of genes between homologous chromosome.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230967
Activity of ligase enzyme is found in
1 Leptotene
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
Ligase enzyme is involved in the process of DNA recombination, which occurs during the pachytene stage of meiosis. Ligase is responsible for sealing the DNA breaks that are created during recombination
[AP EAMCET-2010]
Cell cycle and Cell Division
230969
When paternal and maternal chromosomes change their materials with each other in cell division this event is called :
1 synapsis
2 crossing over
3 bivalent-forming
4 dyad-forming
Explanation:
B Crossing over is reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologous chromosome. It leads to recombination of genes present on two homologus chromosomes. Synapsis - It is the pairing of two homologous chromosome that occurs during meiosis. It is also called as synapsis.
[JIPMER-2003]
Cell cycle and Cell Division
230972
Variation in character are brought about by;
1 duplication of chromosomes during mitosis
2 mutations
3 crossing over during meiosis
4 both (b) and (c)
Explanation:
D Genotypic variation are occurs due to the difference in number or structure of chromosomes or by difference in the genes carried out by the chromosomes. This is called mutation. Crossing over is also responsible for variation by the exchange of chromosomal material during meiosis. Due to mitosis genetically identical daughter cells produces so it is not responsible for variation.