230947
Stages in proper sequence of prophase-I are
1 zygotene, leptotene, pachytene, diakinesis
2 leptotene, zygotene, pachytene, diplotene and diakinesis
3 leptotene, pachyiene, zygotene, diakinesis and diplotene
4 diplotene, diakinesis, pachytene, zygotene and leptotene
Explanation:
B Prophase of the first meiotic division is typically longer and more complex when compared to prophase of mitosis. It has been further sub divided into the following five phases base chromosomal behaviors. The proper sequences of prophase-I are Leptotene, zygotene, pachytene, diplotene and diakinesis.
[MGIMS Wardha-2007]
Cell cycle and Cell Division
230948
Which of the following events takes place during diplotene stage of prophase-I of meiosis?
1 Compaction of chromosome
2 Formation of synaptonemal complexes
3 Formation of recombinational nodules
4 Dissolution of synaptonemal complexes
Explanation:
D During diplotene stage of prophase-I of miosis-I. The dissolution of the synaptonemal complex and the tendency of recombined homologous chromosome of the bivalent to separate from each other except at the sites of cross over.
[DUMET-2010]
Cell cycle and Cell Division
230949
The exchange of segments of non-sister chromatids between chromosomes of a homologous pair is termed as
1 transformation
2 translocation
3 crossing over
4 chromosomal aberration
Explanation:
C The exchange of segment of non-sister chromatids between chromosomes of homologous pair is termed as crossing over. In this process two homologous non-sister chromatids pair up with each other and exchange different segment of genetic material to form two recombinant chromosome sister chromatids.
[DUMET-2010]
Cell cycle and Cell Division
230950
The enzyme involved in the crossing over between two homologous chromosome is
1 nuclease
2 RNA polymerase
3 recombinase
4 DNA polymerase
Explanation:
C Crossing over is an enzyme-mediated process and the enzyme involved is called recombinase, Recombinase enzyme is involved during pachytene stage. Crossing over leads to recombination of genetic material on the two chromosomes.
230947
Stages in proper sequence of prophase-I are
1 zygotene, leptotene, pachytene, diakinesis
2 leptotene, zygotene, pachytene, diplotene and diakinesis
3 leptotene, pachyiene, zygotene, diakinesis and diplotene
4 diplotene, diakinesis, pachytene, zygotene and leptotene
Explanation:
B Prophase of the first meiotic division is typically longer and more complex when compared to prophase of mitosis. It has been further sub divided into the following five phases base chromosomal behaviors. The proper sequences of prophase-I are Leptotene, zygotene, pachytene, diplotene and diakinesis.
[MGIMS Wardha-2007]
Cell cycle and Cell Division
230948
Which of the following events takes place during diplotene stage of prophase-I of meiosis?
1 Compaction of chromosome
2 Formation of synaptonemal complexes
3 Formation of recombinational nodules
4 Dissolution of synaptonemal complexes
Explanation:
D During diplotene stage of prophase-I of miosis-I. The dissolution of the synaptonemal complex and the tendency of recombined homologous chromosome of the bivalent to separate from each other except at the sites of cross over.
[DUMET-2010]
Cell cycle and Cell Division
230949
The exchange of segments of non-sister chromatids between chromosomes of a homologous pair is termed as
1 transformation
2 translocation
3 crossing over
4 chromosomal aberration
Explanation:
C The exchange of segment of non-sister chromatids between chromosomes of homologous pair is termed as crossing over. In this process two homologous non-sister chromatids pair up with each other and exchange different segment of genetic material to form two recombinant chromosome sister chromatids.
[DUMET-2010]
Cell cycle and Cell Division
230950
The enzyme involved in the crossing over between two homologous chromosome is
1 nuclease
2 RNA polymerase
3 recombinase
4 DNA polymerase
Explanation:
C Crossing over is an enzyme-mediated process and the enzyme involved is called recombinase, Recombinase enzyme is involved during pachytene stage. Crossing over leads to recombination of genetic material on the two chromosomes.
230947
Stages in proper sequence of prophase-I are
1 zygotene, leptotene, pachytene, diakinesis
2 leptotene, zygotene, pachytene, diplotene and diakinesis
3 leptotene, pachyiene, zygotene, diakinesis and diplotene
4 diplotene, diakinesis, pachytene, zygotene and leptotene
Explanation:
B Prophase of the first meiotic division is typically longer and more complex when compared to prophase of mitosis. It has been further sub divided into the following five phases base chromosomal behaviors. The proper sequences of prophase-I are Leptotene, zygotene, pachytene, diplotene and diakinesis.
[MGIMS Wardha-2007]
Cell cycle and Cell Division
230948
Which of the following events takes place during diplotene stage of prophase-I of meiosis?
1 Compaction of chromosome
2 Formation of synaptonemal complexes
3 Formation of recombinational nodules
4 Dissolution of synaptonemal complexes
Explanation:
D During diplotene stage of prophase-I of miosis-I. The dissolution of the synaptonemal complex and the tendency of recombined homologous chromosome of the bivalent to separate from each other except at the sites of cross over.
[DUMET-2010]
Cell cycle and Cell Division
230949
The exchange of segments of non-sister chromatids between chromosomes of a homologous pair is termed as
1 transformation
2 translocation
3 crossing over
4 chromosomal aberration
Explanation:
C The exchange of segment of non-sister chromatids between chromosomes of homologous pair is termed as crossing over. In this process two homologous non-sister chromatids pair up with each other and exchange different segment of genetic material to form two recombinant chromosome sister chromatids.
[DUMET-2010]
Cell cycle and Cell Division
230950
The enzyme involved in the crossing over between two homologous chromosome is
1 nuclease
2 RNA polymerase
3 recombinase
4 DNA polymerase
Explanation:
C Crossing over is an enzyme-mediated process and the enzyme involved is called recombinase, Recombinase enzyme is involved during pachytene stage. Crossing over leads to recombination of genetic material on the two chromosomes.
230947
Stages in proper sequence of prophase-I are
1 zygotene, leptotene, pachytene, diakinesis
2 leptotene, zygotene, pachytene, diplotene and diakinesis
3 leptotene, pachyiene, zygotene, diakinesis and diplotene
4 diplotene, diakinesis, pachytene, zygotene and leptotene
Explanation:
B Prophase of the first meiotic division is typically longer and more complex when compared to prophase of mitosis. It has been further sub divided into the following five phases base chromosomal behaviors. The proper sequences of prophase-I are Leptotene, zygotene, pachytene, diplotene and diakinesis.
[MGIMS Wardha-2007]
Cell cycle and Cell Division
230948
Which of the following events takes place during diplotene stage of prophase-I of meiosis?
1 Compaction of chromosome
2 Formation of synaptonemal complexes
3 Formation of recombinational nodules
4 Dissolution of synaptonemal complexes
Explanation:
D During diplotene stage of prophase-I of miosis-I. The dissolution of the synaptonemal complex and the tendency of recombined homologous chromosome of the bivalent to separate from each other except at the sites of cross over.
[DUMET-2010]
Cell cycle and Cell Division
230949
The exchange of segments of non-sister chromatids between chromosomes of a homologous pair is termed as
1 transformation
2 translocation
3 crossing over
4 chromosomal aberration
Explanation:
C The exchange of segment of non-sister chromatids between chromosomes of homologous pair is termed as crossing over. In this process two homologous non-sister chromatids pair up with each other and exchange different segment of genetic material to form two recombinant chromosome sister chromatids.
[DUMET-2010]
Cell cycle and Cell Division
230950
The enzyme involved in the crossing over between two homologous chromosome is
1 nuclease
2 RNA polymerase
3 recombinase
4 DNA polymerase
Explanation:
C Crossing over is an enzyme-mediated process and the enzyme involved is called recombinase, Recombinase enzyme is involved during pachytene stage. Crossing over leads to recombination of genetic material on the two chromosomes.
