Crossing over takes place between which chromatids and in which stage of the cell cycle?
1. | Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I. |
2. | Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I. |
3. | Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I. |
4. | Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I. |
After meiosis I, the resultant daughter cells have
1. | same amount of DNA as in the parent cell in S |
2. | twice the amount of DNA in comparison to haploid |
3. | same amount of DNA in comparison to haploid gamete |
4. | four times the amount of DNA in comparison to haploid gamete |
Which of the following is the correct sequence of events of interphase:-
a. cells metabolically active
b. Duplication of the chromosome but chromosome number remains constant
c. M phased
d. Synthesis of protein [Tubulin]
1.
2.
3.
4.
Which of the following is characteristic of prophase I of meiosis I:-
1. Synapsis in zygotene, genetically different chromatid are seen in pachytene
2. Exchange of genes in leptotene, genetically similar chromatids are seen in zygotene.
3. Chiasmata are present in metaphase
4. Splitting of centromere in anaphase-I
Spindle fibres attach on to:
1. Kinetosome of the chromosome
2. Telomere of the chromosome
3. Kinetochore of the chromosome
4. Centromere of the chromosome
Centromere is required for
1. Crossing over
2. Transcription
3. Cytoplasmic cleavage
4. Movement of chromosomes towards poles
Bivalent align on the equator during
1. Metaphase I of meiosis
2. Anaphase I of meiosis
3. Metaphase of mitosis
4. Anaphase of mitosis
The figures below shows 3 phases of mitosis select the option given correct identification together with the correct event ?
1. C- Telophase-Nuclear envelope assembles around the chromosome clusters
2. B- Anaphase-Segregation of homologous chromosomes.
3. A- Prophase-Chromosomes get fully condensed.
4. C- Metaphase-Condensation of chromatin to form chromosome
Identify the symbols A, B, and C in the figure given below
A B C
1. Prophase Cytokinesis
2. Prophase Metaphase Telophase
3. S
4. Cytokinesis Prophase
1. 1
2. 2
3. 3
4. 4
The correct sequence of phases in cell cycle is:
1.
2.
3.
4.