DNA replication in bacteria occurs ….[NEET- 2017]

Arrange the following events of meiosis in correct sequence : [ ReAIPMT 2015] (a) Crossing over (b) Synapsis (c) Terminalisation of chaismata (d) Disappearance of nucleolus

Satellite DNA is important because it : [ ReAIPMT 2015]

Offsets are produced by ..[ NEET 2018]

The stage during which separation of the paired homologous chromosomes begins is

Select the incorrect match [ NEET 2018]

When Synapsis is complete all along the chromosome, the cell is said to have entered the stage called:

In salivary glands, chromosomes somehow or other the original chromonemata go on dividing longitudinally repeatedly so that they show not 2 or 4 chromonemata as in normal chromosomes but a large number of them. This is termed as Polyteny. Such repeated division of chromonemata threads without actual cell division may be termed as:

Assertion: Chromosomal mutation may take place due to non-disjunction in Meiosis – I. Reason: Meiosis I reduces the chromosome number to half.

Phragmoplast:

Recombination nodules are formed in:

Colchicine prevents the mitosis of cells at which phase of karyokinesis:

Consider the given two statements i) During G1 phase the cell is metabolically active and continuously grows but does not replicate its DNA ii) During G2pahse,proteinsare synthesized in preparation for mitosis while cell growth continues Of the two statements

Match the following:

Column I	Column II
Karyokinesis.	a) Zygotic meiosis
Cell plate	b) Cytoplasmic division.
Diplontic cycle	c) Plant cells.
Haplontic cycle	d) Nuclear division
Cytokinesis	e) Gamete meiosis.

he exchange of segments of non-sister chromatids between chromosomes of a homologous pair termed as

Crossing over that results in genetic recombination in higher organisms occur between:

How many of the following events are not related with mitosis? (i) Sister chromatids are separated. (ii) Pairing between homologous chromosomes. (iii) Spindle fibres attach to the kinetochores of chromosomes. (iv) Crossing over between homologous chromosomes. (v) Formation of synaptonemal complex. (vi) Assembly of nuclear envelope.

Synapsis occurs between

Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage

Chromosomal behaviour occurring during different substages of Prophase I of meiosis is given below; Select the statement which is suited to Diplotene:

The cell which exist in G0 phase.

Which stage of cell division dothe following figures A and B represent respectively?

Assertion: Meiosis II is similar to mitosis. Reason: Meiosis I cannot occur in haploid cells.

The centromeres is present very close to one end of the chromosome in:

Select the correct option with respect to mitosisChromatids start moving towards opposite poles in telophase

Barr body is found in the cytoplasm during

The events of cell division are:

The cell shown in the given diagram is in

A cell at telophase stage is observed by a student in a plant brought from filed. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in

Identify the stage of cell cycle represented by the key events: (i) Chromosome cluster at opposite spindle poles and their identity is lost as discrete elements. (ii) Nuclear envelope assembles around the chromosome clusters. (iii) Nucleolus, golgi complex and ER reforms.