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Choose the correctly matched pairs and c...

Choose the correctly matched pairs and correct option
(a) Leptotene - chromosomes become invisible
(b) Zygotene - pairing of homologous chromosomes
`(c)`Pachytene - Dissolution of synaptonemal complex takes place
(d) Diplotene - Bivalent chromosomes appear as tetrads
(e) Diakinesis - Terminalisation of chiasmata takes place

A

a, b correct

B

b, d correct

C

b, d, e correct

D

b, c correct

Text Solution

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The correct Answer is:
C
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Pick up the correct statement : (a) Synapsis of homologous chromosomes occurs during prophase I (b) Division of centromeres takes place during anaphase I (c) Spindle fibres disappear completely in telophase of mitosis (d) Nucleoli mey reappear in telophase I

Match the columns. {:(,"Column -I","Column -I"),((a),"Leptotene",(i)"Chiasmata"),((b),"Zygotene",(ii)"Chromosomes visible"),((c),"Pachytene",(iii) "The pairing of homologous chromosome "),((d),"Diplotene",(iv)"Clear appearance of tetrads"):}

Which one of them is the correct statement w.r.t a gene and an allele? a) There is one allele for a given gene which is located at a single loci in the homologous chromosome. b) An allele is the unit of DNA responsible for the appearance and inheritance of a character. c) An allele refers to section of DNA that controls certain traits, e.g., blood group type. d) None of these.

Mathc the stages of meisos in Column I to their characteristic features in Column II and select the correct option using the codes given below {:("Column-I","Column-II"),("Pachytene","(i)Pairing of homologous chromosomes"),("Metaphase I","(ii)Terminalization of chiasmata"),("Diakinesis","(iii)Crossing-over takes place"),("Zygotene","(iv)Chromosomes align at aquatorial plate"):}

Name the stage of cell cycle at which one of the following events occur: (i) Chromosomes are moved to spindle equator (ii) Centromere splits and chromatids separate (iii) Pairing between homologous chromosomes takes place (iv) Crossing over between homologous chromosomes takes place

DINESH PUBLICATION-CELL CYCLE (CELL DIVISION)-REVISION QUESTIONS
  1. Identify the meiotic sage in which the homologous chromosomes separate...

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  2. Yeast cell can progress through the cell cycle in about

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  3. Choose the correctly matched pairs and correct option (a) Leptotene ...

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  4. Which is not characteristic of telophase 1. Chromatin condenses to f...

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  5. A stage in mitosis that starts towards the middle of anaphase and is c...

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  6. What is incorrect about G(0)

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  7. Beads on string like structures of A are seen in B, which further cond...

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  8. The plane of cell wall formation in a dividing cell is determined by ...

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  9. The term synaptonemal complex refers to site of

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  10. Division of cytoplasm after completion of nuclear division is called

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  11. Crossing over takes place in

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  12. Identify the correct pair of statements I. Movement of cytoplasm aro...

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  13. Match the lists and find the correct option {:(,I,,II,),(a.,G(2)" ph...

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  14. A stage in cell division is shown in the figure. Select the answer whi...

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  15. The complex formed by a pair of synapsed homologous chromosomes is cal...

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  16. Identify the stage of mitosis with its characteristics

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  17. In onion root tip during mitotic metaphase, the number of kinetochores...

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  18. Metaphase chromosome appears to be longitudinally divided into two ide...

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  19. The homologous genes are separated at

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  20. Which substance is used to keep cells in metaphase stage of mitosis i...

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