B Recombination of genes occur at prophase Iin meiosis during pachytene stage. It is a longest phase because it take time to crossing over. This stage is characterized by the presence of recombination nodules. Pachytene involves mutual exchange of the corresponding segments of non-sister chromatids of homologous chromosomes.
[J and K CET-2002]
Cell cycle and Cell Division
230974
The exchange of chromosomal segment between two non-homologous chromosomes called as
1 crossing-over
2 translocation
3 inversion
4 duplication
Explanation:
B Translocation - When two non homologous chromosomes exchange their parts, the resulting chromosomal rearrangements are translocations. It may be reciprocal or non-reciprocal. Non reciprocal translocation involves the transfer of a segment in one direction from one chromosomes to another. In reciprocal translocation, the most common type is segment from one chromosome is exchanged with a segment form another non-homologous chromosome.
[Assam CEE-2014]
Cell cycle and Cell Division
230975
The pairing of homologous chromosomes in meiosis is known as.
1 bivalent
2 synapsis
3 disjunction
4 synergids.
Explanation:
B Synapsis is an event that occurs during meiosis in which homologous chromosomes pair. Synapsis is the pairing of two homologous chromosome that occurs during prophase-I of meiosis. It allows matching up of homologous pairs prior to their segregation. Synapsis are two specialized cell lying adjacent to the egg cell in the female gametophyte of angiosperms.
[AIIMS-1994]
Cell cycle and Cell Division
230976
During meiosis, crossing over occurs between:
1 Sister chromatids of homologous chromosome
2 Non-sister chromatids of homologous chromosome
3 Sister chromatids of non-homologous chromosome
4 Non-homologous chromatids of homologous chromosome
Explanation:
B Crossing over is a reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologus chromosomes. It leads to recombination of gene present on two homologus chromosomes and enzyme involve in crossing over is called recombinase.
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Cell cycle and Cell Division
230973
Recombination of genes occur at:
1 prophase in mitosis
2 prophase-I in meiosis
3 prophase-II in meiosis
4 metaphase-H in meiosis
Explanation:
B Recombination of genes occur at prophase Iin meiosis during pachytene stage. It is a longest phase because it take time to crossing over. This stage is characterized by the presence of recombination nodules. Pachytene involves mutual exchange of the corresponding segments of non-sister chromatids of homologous chromosomes.
[J and K CET-2002]
Cell cycle and Cell Division
230974
The exchange of chromosomal segment between two non-homologous chromosomes called as
1 crossing-over
2 translocation
3 inversion
4 duplication
Explanation:
B Translocation - When two non homologous chromosomes exchange their parts, the resulting chromosomal rearrangements are translocations. It may be reciprocal or non-reciprocal. Non reciprocal translocation involves the transfer of a segment in one direction from one chromosomes to another. In reciprocal translocation, the most common type is segment from one chromosome is exchanged with a segment form another non-homologous chromosome.
[Assam CEE-2014]
Cell cycle and Cell Division
230975
The pairing of homologous chromosomes in meiosis is known as.
1 bivalent
2 synapsis
3 disjunction
4 synergids.
Explanation:
B Synapsis is an event that occurs during meiosis in which homologous chromosomes pair. Synapsis is the pairing of two homologous chromosome that occurs during prophase-I of meiosis. It allows matching up of homologous pairs prior to their segregation. Synapsis are two specialized cell lying adjacent to the egg cell in the female gametophyte of angiosperms.
[AIIMS-1994]
Cell cycle and Cell Division
230976
During meiosis, crossing over occurs between:
1 Sister chromatids of homologous chromosome
2 Non-sister chromatids of homologous chromosome
3 Sister chromatids of non-homologous chromosome
4 Non-homologous chromatids of homologous chromosome
Explanation:
B Crossing over is a reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologus chromosomes. It leads to recombination of gene present on two homologus chromosomes and enzyme involve in crossing over is called recombinase.
B Recombination of genes occur at prophase Iin meiosis during pachytene stage. It is a longest phase because it take time to crossing over. This stage is characterized by the presence of recombination nodules. Pachytene involves mutual exchange of the corresponding segments of non-sister chromatids of homologous chromosomes.
[J and K CET-2002]
Cell cycle and Cell Division
230974
The exchange of chromosomal segment between two non-homologous chromosomes called as
1 crossing-over
2 translocation
3 inversion
4 duplication
Explanation:
B Translocation - When two non homologous chromosomes exchange their parts, the resulting chromosomal rearrangements are translocations. It may be reciprocal or non-reciprocal. Non reciprocal translocation involves the transfer of a segment in one direction from one chromosomes to another. In reciprocal translocation, the most common type is segment from one chromosome is exchanged with a segment form another non-homologous chromosome.
[Assam CEE-2014]
Cell cycle and Cell Division
230975
The pairing of homologous chromosomes in meiosis is known as.
1 bivalent
2 synapsis
3 disjunction
4 synergids.
Explanation:
B Synapsis is an event that occurs during meiosis in which homologous chromosomes pair. Synapsis is the pairing of two homologous chromosome that occurs during prophase-I of meiosis. It allows matching up of homologous pairs prior to their segregation. Synapsis are two specialized cell lying adjacent to the egg cell in the female gametophyte of angiosperms.
[AIIMS-1994]
Cell cycle and Cell Division
230976
During meiosis, crossing over occurs between:
1 Sister chromatids of homologous chromosome
2 Non-sister chromatids of homologous chromosome
3 Sister chromatids of non-homologous chromosome
4 Non-homologous chromatids of homologous chromosome
Explanation:
B Crossing over is a reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologus chromosomes. It leads to recombination of gene present on two homologus chromosomes and enzyme involve in crossing over is called recombinase.
B Recombination of genes occur at prophase Iin meiosis during pachytene stage. It is a longest phase because it take time to crossing over. This stage is characterized by the presence of recombination nodules. Pachytene involves mutual exchange of the corresponding segments of non-sister chromatids of homologous chromosomes.
[J and K CET-2002]
Cell cycle and Cell Division
230974
The exchange of chromosomal segment between two non-homologous chromosomes called as
1 crossing-over
2 translocation
3 inversion
4 duplication
Explanation:
B Translocation - When two non homologous chromosomes exchange their parts, the resulting chromosomal rearrangements are translocations. It may be reciprocal or non-reciprocal. Non reciprocal translocation involves the transfer of a segment in one direction from one chromosomes to another. In reciprocal translocation, the most common type is segment from one chromosome is exchanged with a segment form another non-homologous chromosome.
[Assam CEE-2014]
Cell cycle and Cell Division
230975
The pairing of homologous chromosomes in meiosis is known as.
1 bivalent
2 synapsis
3 disjunction
4 synergids.
Explanation:
B Synapsis is an event that occurs during meiosis in which homologous chromosomes pair. Synapsis is the pairing of two homologous chromosome that occurs during prophase-I of meiosis. It allows matching up of homologous pairs prior to their segregation. Synapsis are two specialized cell lying adjacent to the egg cell in the female gametophyte of angiosperms.
[AIIMS-1994]
Cell cycle and Cell Division
230976
During meiosis, crossing over occurs between:
1 Sister chromatids of homologous chromosome
2 Non-sister chromatids of homologous chromosome
3 Sister chromatids of non-homologous chromosome
4 Non-homologous chromatids of homologous chromosome
Explanation:
B Crossing over is a reciprocal exchange of equal and corresponding segment between non-sister chromatids in a pair of homologus chromosomes. It leads to recombination of gene present on two homologus chromosomes and enzyme involve in crossing over is called recombinase.