NEET Test Series from KOTA - 10 Papers In MS WORD
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Cell cycle and Cell Division
230992
A bivalent of meiosis I consists of
1 Four chromatids and two centromeres
2 Two chromatids and one centromere
3 Two chromatids and two centromeres
4 Four chromatids and four centromeres
Explanation:
A bivalent is a homologous chromosomes that have been paired up during prophase I of meiosis. Each chromosome consist of two sister chromatids that are held together by a centromere, So a bivalent consist of four chromatids and two centromeres.
[Karnataka CET-2013]
Cell cycle and Cell Division
230993
Synapsis is found in:
1 leptotene phase
2 zygotene phase
3 pachytene phase
4 diplotene phase
Explanation:
B Synapsis occurs during prophase-I of meiosis in the zygotene stages. In this phase the chromosomes becomes shorter and thicker bivalent or tetrad are seen. Synapsis of chromosomes occurs and forms bivalent synaptonemal complexes to stabilize the paired position of chromosomes.
[Rajasthan PMT-1997]
Cell cycle and Cell Division
230994
Exchange of paternal and maternal chromosomes material during cell division is called
1 dyad formation
2 bivalent formation
3 synapsis
4 crossing over
Explanation:
D Crossing over is the exchange of genetic material between two homologous non-sister chromatids. It occurs during prophase I of meiosis, when the homologous chromosomes are paired up. The exchange of genetic material can lead to new genetic combination in the offspring.
[J and K CET-2013]
Cell cycle and Cell Division
230997
Exchange of genetic material two homologous chromosomes occurs in
1 Zygotene
2 Pachytene
3 Diakinesis
4 Anaphase I
Explanation:
B In the process of "crossing over". Which often occurs during the tetrad formation of meiosis, homologous exchange portions of their genetic code. - The exchange of genetic material between two homologous chromosome is occur in the pachytene stage of prophase I of meiosis I.
A bivalent is a homologous chromosomes that have been paired up during prophase I of meiosis. Each chromosome consist of two sister chromatids that are held together by a centromere, So a bivalent consist of four chromatids and two centromeres.
[Karnataka CET-2013]
Cell cycle and Cell Division
230993
Synapsis is found in:
1 leptotene phase
2 zygotene phase
3 pachytene phase
4 diplotene phase
Explanation:
B Synapsis occurs during prophase-I of meiosis in the zygotene stages. In this phase the chromosomes becomes shorter and thicker bivalent or tetrad are seen. Synapsis of chromosomes occurs and forms bivalent synaptonemal complexes to stabilize the paired position of chromosomes.
[Rajasthan PMT-1997]
Cell cycle and Cell Division
230994
Exchange of paternal and maternal chromosomes material during cell division is called
1 dyad formation
2 bivalent formation
3 synapsis
4 crossing over
Explanation:
D Crossing over is the exchange of genetic material between two homologous non-sister chromatids. It occurs during prophase I of meiosis, when the homologous chromosomes are paired up. The exchange of genetic material can lead to new genetic combination in the offspring.
[J and K CET-2013]
Cell cycle and Cell Division
230997
Exchange of genetic material two homologous chromosomes occurs in
1 Zygotene
2 Pachytene
3 Diakinesis
4 Anaphase I
Explanation:
B In the process of "crossing over". Which often occurs during the tetrad formation of meiosis, homologous exchange portions of their genetic code. - The exchange of genetic material between two homologous chromosome is occur in the pachytene stage of prophase I of meiosis I.
A bivalent is a homologous chromosomes that have been paired up during prophase I of meiosis. Each chromosome consist of two sister chromatids that are held together by a centromere, So a bivalent consist of four chromatids and two centromeres.
[Karnataka CET-2013]
Cell cycle and Cell Division
230993
Synapsis is found in:
1 leptotene phase
2 zygotene phase
3 pachytene phase
4 diplotene phase
Explanation:
B Synapsis occurs during prophase-I of meiosis in the zygotene stages. In this phase the chromosomes becomes shorter and thicker bivalent or tetrad are seen. Synapsis of chromosomes occurs and forms bivalent synaptonemal complexes to stabilize the paired position of chromosomes.
[Rajasthan PMT-1997]
Cell cycle and Cell Division
230994
Exchange of paternal and maternal chromosomes material during cell division is called
1 dyad formation
2 bivalent formation
3 synapsis
4 crossing over
Explanation:
D Crossing over is the exchange of genetic material between two homologous non-sister chromatids. It occurs during prophase I of meiosis, when the homologous chromosomes are paired up. The exchange of genetic material can lead to new genetic combination in the offspring.
[J and K CET-2013]
Cell cycle and Cell Division
230997
Exchange of genetic material two homologous chromosomes occurs in
1 Zygotene
2 Pachytene
3 Diakinesis
4 Anaphase I
Explanation:
B In the process of "crossing over". Which often occurs during the tetrad formation of meiosis, homologous exchange portions of their genetic code. - The exchange of genetic material between two homologous chromosome is occur in the pachytene stage of prophase I of meiosis I.
A bivalent is a homologous chromosomes that have been paired up during prophase I of meiosis. Each chromosome consist of two sister chromatids that are held together by a centromere, So a bivalent consist of four chromatids and two centromeres.
[Karnataka CET-2013]
Cell cycle and Cell Division
230993
Synapsis is found in:
1 leptotene phase
2 zygotene phase
3 pachytene phase
4 diplotene phase
Explanation:
B Synapsis occurs during prophase-I of meiosis in the zygotene stages. In this phase the chromosomes becomes shorter and thicker bivalent or tetrad are seen. Synapsis of chromosomes occurs and forms bivalent synaptonemal complexes to stabilize the paired position of chromosomes.
[Rajasthan PMT-1997]
Cell cycle and Cell Division
230994
Exchange of paternal and maternal chromosomes material during cell division is called
1 dyad formation
2 bivalent formation
3 synapsis
4 crossing over
Explanation:
D Crossing over is the exchange of genetic material between two homologous non-sister chromatids. It occurs during prophase I of meiosis, when the homologous chromosomes are paired up. The exchange of genetic material can lead to new genetic combination in the offspring.
[J and K CET-2013]
Cell cycle and Cell Division
230997
Exchange of genetic material two homologous chromosomes occurs in
1 Zygotene
2 Pachytene
3 Diakinesis
4 Anaphase I
Explanation:
B In the process of "crossing over". Which often occurs during the tetrad formation of meiosis, homologous exchange portions of their genetic code. - The exchange of genetic material between two homologous chromosome is occur in the pachytene stage of prophase I of meiosis I.
