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Differences between Mitosis and Meiosis

Cell division...

Question

Cell division is tightly regulated, which of the following is true regarding mitosis or meiosis.
I. Mitosis shows no homologous pairing.
II. There is no S phase between meiosis I and II.
III. Meiosis centromeres do not divide at anaphase I.

A

I and III only

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B

I and II only

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C

II only

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D

I, II and III

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Solution

The correct option is D I, II and III
Homologous pairing occurs in meiosis when homologous chromosomes come closer and synapsis occur leading to homologous pairing.
S phase occurs between G1 and G2 phase not between meiosis1 and meiosis2.
At anaphase I, sister chromatids remain attached to their centromeres, so they do not divide at this stage.
So the correct option is 'I, II and III'

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Q. Which of the following statements is true?
(i) Mitosis is preceded by one cycle of DNA replication and meiosis is preceded by two cycles of DNA replication.
(ii) In sexually reproducing organisms, meiosis is the only type of cell division observed.
(iii) Meiotic cell division is essential for the production of haploid gametes.

Q. Which of the following statement(s) is/are correct about meiosis?
I. Meiosis involves pairing of homologous chromosomes and recombination between them.
II. Two diploid cells are formed at the end of meiosis-II.
III. Meiosis involves two sequential cycles of nuclear and cell division called meiosis-I and meiosis-II, but only a single cycle of DNA replication.
IV. Meiosis-I is initiated after the parental chromosome replication, which produces identical sister chromatids at the S-phase.

Q. Figure below shows a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis

Which diagram(s) represent anaphase II of meiosis?

Q. Assertion :Meiosis-I is called reductional division in which crossing over occur between homologous chromosomes and as end product each cell receives one set of chromosomes. Reason: Meiosis II is same as Mitosis.

Q. Meiosis II is said to be similar to mitosis, however the two differ in some aspects like
a. In meiosis II, the two daughter cells formed from each cell are generally genetically different
b. Meiosis II is initiated immediately after cytokinesis
c. In animals, mitosis takes place in both haploid and diploid cells
d. Synaptonemal complex is formed in meiosis II
e. Centromere does not divide in meiosis II
The correct statements are

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