Cell-cycle & cell division practice · Mixed difficulty

A cell plate is laid down during

Quiescent centre is the zone of

Choose the odd one for metaphase.

Number of bivalents are 8 in prophase I. What is the number of chromosomes during anaphase II?

The morphology of chromosomes can be studied most easily in

An egg cell has 5pico gram of DNA in its nucleus. How much amount of DNA will be, in this animal, at the end of ${G_2}$-phase of mitosis?

A zoologist examined an intestine cell from a crayfish and counted 200 chromosomes, each consisting of 2 chromatids, at prophase I of mitosis. What would he expect to see in each of the four cells at telophase II of meiosis if he looked in the crayfish ovary?

The phase between two successive M-phase is called

Failure of cytokinesis after …A… stage of cell division results in an increase in a whole set of chromosomes in an organism called …B…

Find out the number of chromosomes and the amount of DNA in a spore mother cell of Bryophytes in $\mathrm{G}_2$ stage (If the spore contains 5 chromosomes and $5 \mathrm{pg}$ of $\mathrm{DNa}$ )-

You are given 13-Meiotic divisions, from these divisions how many seeds you can form? How many pollen grains will be wasted?

20 Chromosomes and 30 pg of DNA is present in a meristematic cell. What will be the number of chromosomes and amount of DNA present in this cell just after $G_2$ phase of cell cycle?

Select incorrect statements
1) Diplotene stage is not recognized by the dissolution of the synaptonemal complex.
2) Recombination nodules contain a recombinase enzyme.
3) Interkinesis is generally short-lived.
4) In anaphase II separation of homologous chromosomes (bivalent) separate to opposite poles.

In the process of mitotic division during interphase, chromosome material remains in the form of very loosely coiled threads called

If a gamete in pollen tube has $12\,pg$ of $DNA$ then what amount of $DNA$ would have been there in its pollen mother cell at ${G_2}$ phase?

In which of the following phase of cell cycle, mitotic division got arrested?

Which disturb the nucleocytoplasmic ratio

Choose the correct statements regarding cell cycle
I. Interphase is called the resting phase
II. Interphase is the time during which the cell is preparing for division
III. The interphase is divided into phases, i.e.,G_1, S and G_2-phase
IV. Interphase represents the phase between the two successive M-phases
The option with correct statements is

In a cell cycle, which structures serves as the site of attachment of spindle fibres?

Read the following statements and choose the option which is true for them.

Statement A : The steps of cell division are themselves under genetic control.

Statement B : Cell growth in terms of cytoplasmic increase is a continuous process.

Meiocyte could be

The sequence of events by which a cell duplicates its genome, synthesizes the other constituents of the cell and eventually divides into two daughter cells is termed as

Genetic recombination occurs due to fertilization and meiosis crossing over.

Assertion: In animals, mitotic cell division is only seen in the diploid somatic cells.

Reason: Plants can show meiotic divisions in both haploid and diploid cells.

What would be the change in the chromosome number, during S-phase?

What is the correct sequence of the steps given here?
Also work out the process depicted in the steps?
I. Homologous chromosomes move toward opposite poles of the cell; chromatids do not separate.
II. Chromosomes gather together at the two poles of the cell and the nuclear membrances reform.
III. Homologous chromosomes pair and exchanges segments.
IV. Homologous chromosomes align on a central plate.
V. The haploid cells separate completely.

Which one of the following never occurs during mitotic cell division?

During which stage of meiosis, do tetrads line up at the equator?

In which stage of cell division, chromosomes are most condensed?

Differentiated cell remains at which stage?