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Mendel's Dihybrid Experiments

Meiosis invol...

Question

Meiosis involves

A

Pairing of non-homologous chromosomes and recombination between them

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B

Formation of chiasmata

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C

Its absence in humans

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D

No centromeric division

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Solution

The correct option is B Formation of chiasmata
Formation of chiasmata occurs during prophase-I of meiosis-I. These are the points of attachment between homologous chromosomes.

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Q. Pick the correct statements.
A. Synapsis of homologous chromosomes takes place during prophase I of meiosis.
B. Division of centromeres takes place during anaphase I of meiosis.
C. Spindle fibres disappear completely in telophase of mitosis.
D. Nucleoli reappear at telophase I of meiosis.

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. Separation of homologous chromosomes without centromere division occurs in?

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. What are homologous chromosomes? Name the stage of cell division in which paired homologous chromosomes get shortened & thickened. What happen to homologous chromosomes during meiosis?

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