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Question
What is the importance of chiasma formation?
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Solution
Chiasma is the region where crossing-over takes place. By the formation of the chiasma, the exchange of genetic material between non-sister chromatids of the homologous chromosomes is accomplished. So, chiasma is the means of bringing about recombination of characters and thus variations in multicellular organisms
RELATED QUESTIONS
Define the following:
Chiasmata
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.
What is terminalization?
What is crossing over?
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:
