230907
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
1 Prophase of Mitosis
2 Both prophase and metaphase of mitosis
3 Prophase I during meiosis
4 Prophase II during meiosis
Explanation:
: The figure represents crossing over between bivalent of non sister chromatids of homologous chromosomes occurred during pachytene stage prophase-I of meiotic cycle. Prophase-I marks the beginning of chromosome condensation where duplicated chromosome attached with sister chromatids are initially seen as long thin threads.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230882
The term Meiosis was given by :
1 Johansen
2 Knoll and Ruska
3 A. Fleming
4 Farmer and Moore
Explanation:
D Term meiosis was given by Farmer and Moore (1905). Johanson- Gave the term gene (1909). Knoll and Ruska- Invented the first electron microscope (1931). A. Fleming- He discovered the penicillin.
[BVP-2005 / Haryana PMT-2004
Cell cycle and Cell Division
230887
Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after
1 Prophase
2 Metaphase
3 Anaphase
4 Telophase
Explanation:
B All living organisms of the biological world start life as one cell i.e. unicellular zygote. - During anaphase each pair of chromosomes is separated into identical, independent chromosomes and separated by mitotic spindle. - Chromosome doubling may be carried out artificially with chemicals, such as colchicine oftain fertile plants from sterile hybrid.
[RE-NEET (UG)-06.06.2023 (Manipur)]
Cell cycle and Cell Division
230888
The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?
1 Diakinesis
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
C Pachytene is the third stage of meiosis prophase-I - Meiosis is the process in eukaryotic sexually reproducing animals that reduces the number of chromosomes in a cell before reproduction. - Contraction of chromosomes is continuous. Pachytene stage begins just when the synapsis has completed. The paired chromosomes structures are called bivalents. If there are more than two homologous in paired condition they are called multivalents.
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Cell cycle and Cell Division
230907
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
1 Prophase of Mitosis
2 Both prophase and metaphase of mitosis
3 Prophase I during meiosis
4 Prophase II during meiosis
Explanation:
: The figure represents crossing over between bivalent of non sister chromatids of homologous chromosomes occurred during pachytene stage prophase-I of meiotic cycle. Prophase-I marks the beginning of chromosome condensation where duplicated chromosome attached with sister chromatids are initially seen as long thin threads.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230882
The term Meiosis was given by :
1 Johansen
2 Knoll and Ruska
3 A. Fleming
4 Farmer and Moore
Explanation:
D Term meiosis was given by Farmer and Moore (1905). Johanson- Gave the term gene (1909). Knoll and Ruska- Invented the first electron microscope (1931). A. Fleming- He discovered the penicillin.
[BVP-2005 / Haryana PMT-2004
Cell cycle and Cell Division
230887
Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after
1 Prophase
2 Metaphase
3 Anaphase
4 Telophase
Explanation:
B All living organisms of the biological world start life as one cell i.e. unicellular zygote. - During anaphase each pair of chromosomes is separated into identical, independent chromosomes and separated by mitotic spindle. - Chromosome doubling may be carried out artificially with chemicals, such as colchicine oftain fertile plants from sterile hybrid.
[RE-NEET (UG)-06.06.2023 (Manipur)]
Cell cycle and Cell Division
230888
The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?
1 Diakinesis
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
C Pachytene is the third stage of meiosis prophase-I - Meiosis is the process in eukaryotic sexually reproducing animals that reduces the number of chromosomes in a cell before reproduction. - Contraction of chromosomes is continuous. Pachytene stage begins just when the synapsis has completed. The paired chromosomes structures are called bivalents. If there are more than two homologous in paired condition they are called multivalents.
230907
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
1 Prophase of Mitosis
2 Both prophase and metaphase of mitosis
3 Prophase I during meiosis
4 Prophase II during meiosis
Explanation:
: The figure represents crossing over between bivalent of non sister chromatids of homologous chromosomes occurred during pachytene stage prophase-I of meiotic cycle. Prophase-I marks the beginning of chromosome condensation where duplicated chromosome attached with sister chromatids are initially seen as long thin threads.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230882
The term Meiosis was given by :
1 Johansen
2 Knoll and Ruska
3 A. Fleming
4 Farmer and Moore
Explanation:
D Term meiosis was given by Farmer and Moore (1905). Johanson- Gave the term gene (1909). Knoll and Ruska- Invented the first electron microscope (1931). A. Fleming- He discovered the penicillin.
[BVP-2005 / Haryana PMT-2004
Cell cycle and Cell Division
230887
Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after
1 Prophase
2 Metaphase
3 Anaphase
4 Telophase
Explanation:
B All living organisms of the biological world start life as one cell i.e. unicellular zygote. - During anaphase each pair of chromosomes is separated into identical, independent chromosomes and separated by mitotic spindle. - Chromosome doubling may be carried out artificially with chemicals, such as colchicine oftain fertile plants from sterile hybrid.
[RE-NEET (UG)-06.06.2023 (Manipur)]
Cell cycle and Cell Division
230888
The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?
1 Diakinesis
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
C Pachytene is the third stage of meiosis prophase-I - Meiosis is the process in eukaryotic sexually reproducing animals that reduces the number of chromosomes in a cell before reproduction. - Contraction of chromosomes is continuous. Pachytene stage begins just when the synapsis has completed. The paired chromosomes structures are called bivalents. If there are more than two homologous in paired condition they are called multivalents.
230907
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
1 Prophase of Mitosis
2 Both prophase and metaphase of mitosis
3 Prophase I during meiosis
4 Prophase II during meiosis
Explanation:
: The figure represents crossing over between bivalent of non sister chromatids of homologous chromosomes occurred during pachytene stage prophase-I of meiotic cycle. Prophase-I marks the beginning of chromosome condensation where duplicated chromosome attached with sister chromatids are initially seen as long thin threads.
[AIPMT (Screening)-2012]
Cell cycle and Cell Division
230882
The term Meiosis was given by :
1 Johansen
2 Knoll and Ruska
3 A. Fleming
4 Farmer and Moore
Explanation:
D Term meiosis was given by Farmer and Moore (1905). Johanson- Gave the term gene (1909). Knoll and Ruska- Invented the first electron microscope (1931). A. Fleming- He discovered the penicillin.
[BVP-2005 / Haryana PMT-2004
Cell cycle and Cell Division
230887
Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after
1 Prophase
2 Metaphase
3 Anaphase
4 Telophase
Explanation:
B All living organisms of the biological world start life as one cell i.e. unicellular zygote. - During anaphase each pair of chromosomes is separated into identical, independent chromosomes and separated by mitotic spindle. - Chromosome doubling may be carried out artificially with chemicals, such as colchicine oftain fertile plants from sterile hybrid.
[RE-NEET (UG)-06.06.2023 (Manipur)]
Cell cycle and Cell Division
230888
The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?
1 Diakinesis
2 Zygotene
3 Pachytene
4 Diplotene
Explanation:
C Pachytene is the third stage of meiosis prophase-I - Meiosis is the process in eukaryotic sexually reproducing animals that reduces the number of chromosomes in a cell before reproduction. - Contraction of chromosomes is continuous. Pachytene stage begins just when the synapsis has completed. The paired chromosomes structures are called bivalents. If there are more than two homologous in paired condition they are called multivalents.
