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.

I and Ill

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Only II

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II and III

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I, II, III and IV

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Solution

The correct option is A I and Ill
Synapsis (additionally called syndesis) is the matching of two homologous chromosomes that happens amid meiosis. It permits coordinating up of homologous sets preceding their isolation, and a conceivable chromosomal hybrid between them. Synapsis happens amid prophase I of meiosis.
Meiosis includes two consecutive cycles of atomic and cell division called meiosis I and meiosis II yet just a solitary cycle of DNA replication. Meiosis I is started after the parental chromosomes have duplicated to deliver indistinguishable sister chromatids at the S stage.
So, the correct option is 'I and Ill'

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Similar questions

Q. Which of the following statements is/are correct?
(A) Meiosis involves two sequential cycles of each event, i.e., DNA replication and nuclear division.
(B) Meiosis involves pairing of homologous chromosomes and recombination between them.
(C) Four haploid cells are formed at the end of meiosis-I.
(D) Meiosis ensures the production of haploid phase in the life cycle of sexually reproducing organisms.

Q. Which of the following statements are incorrect about meiosis ?
(a) It yields four genetically identical cells
(b) It involves two successive divisions without any DNA replication occurring between them.
(c) Intrameiotic interphase involves replication of DNA and centrioles.
(d) Meiosis -I results in the formation of two daughter cells each with haploids number of chromosomes and

1 C

DNA content

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.

Question 9
Identify the wrong statement about meiosis
(a) Pairing of homologous chromosomes
(b) Four haploid cells are formed
(c) At the end of meiosis the number of chromosomes are reduced to half
(d) Two cycle of DNA replication occurs

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.

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