Cell Division
Test your knowledge of cell division, including mitosis, meiosis, chromosome structure, and cell cycle phases.
Questions
Name the stage at which progressive condensation and coiling of chromatin fibres take place:
- Late Prophase or early Metaphase
- Leptotene
- Pachytene
- Zygotene
- Anaphase
Volume of nucleus is increased and chromosomes develop a number of major coils, which grow in size as prophase proceeds. This phenomenon takes place in____________.
- zygotene
- pachytene
- leptotene
- diplotene
- diakinesis
In which stage the chromosome number is reduced to half, with each set moving towards opposite poles?
- Second meiotic division
- Prophase I
- Telophase I
- Metaphase I
- Anaphase I
Which of the following statement is not correct with respect to the chromosomes?
- Chromosomes are straight, rod-like, coiled or thread-like in structure.
- Chromosomes range from 0.5 to 30 microns in length and from 0.2 to 3 microns in diameter.
- Each Chromosome has a centromere, which holds together the two chromatids.
- There is a variable number of chromosomes in each cell.
- There are two types of chromosomes found in the human body - Autosomes and Allosomes.
Duplicated chromosomes are joined at a point termed
- centrosome
- centromere
- centriole
- chromatid
- chromomere
Duplication of DNA occurs in
- G1 phase
- G2 phase
- S phase
- M phase
- Prophase
In meiotic cell division, four daughter cells are produced by two successive divisions in which
- first division is equational and second is reductional
- first division is reductional and second division is equational
- both divisions are reductional
- both divisions are equational
- there is no division at all
The nuclear membrane and nucleolus become indistinguishable during____________.
- Telophase
- Metaphase
- Prophase
- Interphase
- Anaphase
The centromere divides into two in
- Prophase
- Telophase
- Anaphase
- Metaphase
- Interphase
Which of the following statement is false?
- Meiosis leads to recombination of character.
- Chromosomes other than sex-chromosomes are autosomes.
- Asexual reproduction is accomplished through mitosis.
- Chromosomes are thickest and shortest in telophase.
- Cytokineses takes place through furrow in animal cells.
How many chromosomes are found in a cell of human?
- 20 pairs
- 23 chromosomes
- 46 chromosomes
- 46 pairs
- 20 chromosomes
The disappearance of spindle and uncoiling of chromosomes takes place in ________.
- anaphase
- telophase
- pachytene
- metaphase
- prophase
Which of the following is not correct with respect to meiosis?
- It involves two successive divisions resulting in the formation of four daughter nuclei.
- Prophase is of longer duration and complex.
- Number of chromosomes in daughter cells is half to that of the mother cells.
- It occurs in somatic cells and equational division takes place.
- Meiosis forms gametes and spores and maintains the chromosome number constant from generation to generation.
Mitosis is very significant. Which of the following is not a significance of Mitosis?
- It helps to maintain linear heredity of an organism by keeping the chromosome numbers constant in daughter cells.
- It helps in development of organism from zygotic stage to adult stage.
- It is the means of repair and regeneration of cells and replacement of the old and dead cells.
- Sexual reproduction is accomplished only through mitosis.
- Details of mitosis are similar in all organisms, which emphasizes the unity of life.
The period between two successive mitotic divisions is
- diakinesis
- mitosis
- anaphase
- diplotene
- interphase