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प्रश्न
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उत्तर
Significance of Crossing over:
(i) As a result of crossing over, the paternal and maternal homologous chromosomes of an organism pair up and exchange certain portions of their chromatids which lead to genetic variations.
(ii) It makes the genetic information in each haploid cell unique.
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संबंधित प्रश्न
What is the importance of chiasma formation?
Differentiate between
Chiasmata and crossing over.
Name the Following
The process is responsible for the variation.
Name the Following
Stage in which the crossing-over takes place.
Give Technical Terms
Crossing over occurs during the third substage of meiosis.
Write the functional activity of the following structure:
Chiasmata
What is terminalization?
What is the bouquet stage?
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?
