Advertisements
Advertisements
प्रश्न
How prophase-I of meiosis differs from prophase of mitosis in an essential way? Describe how it affects the daughter cells?
Advertisements
उत्तर
Prophase-I of meiosis has five sub-stages namely Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis. In pachytene exchange of genetic material between non-sister chromatids takes place through crossing over and chiasma formation which does not occur in prophase of mitosis. As a result, the daughter cells have a variation in their genetic composition contrary to identical daughter cells of mitosis.
APPEARS IN
संबंधित प्रश्न
Define the following:
Chiasmata
Choose the correct answer:
Crossing over is a feature of _______________
Choose the correct answer:
DNA replication takes place in ______________
What is the importance of chiasma formation?
Multiple Choice Question:
The regions where crossing-over takes place are called
Write the functional activity of the following structure:
Chiasmata
What is zygotene?
Match List I with List II.
| List I (Sub Phases of Prophase I) |
List II (Specific characters) |
| A. Diakinesis | I. Synaptonemal complex formation |
| B. Pachytene | II. Completion of terminalisation of chiasmata |
| C. Zygotene | III. Chromosomes look like thin threads |
| D. Leptotene | IV. Appearance of recombination nodules |
Choose the correct answer from the options given below:
The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?
