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Which of the following is correct about bivalent?
(i) Bivalents are tetrads.
(ii) A bivalent means 4 chromatids and 2 centromeres.
(iii) One bivalent consists of 2 homologous chromosomes.
(iv) Bivalents form in zygotene.

A

i,ii,iii and iv

B

iii only

C

iii and iv

D

iv only

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The correct Answer is:
A
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NCERT FINGERTIPS-CELL CYCLE AND CELL DIVISION-Cell Cycle And Cell Division
  1. The members of a homologous pair of chromosomes

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  2. Which of the following correctly shows a pair of homologous chromosome...

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  3. Which of the following is correct about bivalent? (i) Bivalents are...

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  4. The process of crossing over is assisted by which of the following enz...

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  5. To build up food reserves in the cytoplasm, chromosomes become unfolde...

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  6. At which stage, the homologous chromosomes separate due to repulsion, ...

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  7. Diplotene stage of prophase-I is characterised by

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  8. (i) Thin thread like chromosomes with a beaded appearance (ii) Appea...

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  9. (i) Thin thread like chromosomes with a beaded appearance (ii) Appea...

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  10. Mathc the column I with column II and select the option from given cod...

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  11. Identify the given figures showing meiotic phases and select the corre...

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  12. The figure given below shows a cell undergoing meiosis. Which of ...

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  13. Disjunction refers to

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  14. Lampbrush chromosomes are seen in which typical stage?

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  15. Mathc column I with column II and select the correct option from the g...

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  16. During meiosis I, chromosome number

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  17. Refer to the given stages A,B,C and D of meiosis I and select the inco...

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  18. During meiosis I in humans, one of the daughter cells receives

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  19. The number of chromosomes is reduced to half during

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  20. Four different steps that occur during meiosis are given in the follow...

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