Q. 155.0( 1 Vote )
The important event of meiosis is the crossing over. It occurs during ________ .
A. Leptotene
B. Pachytene
C. Diplotene
D. Zygotene
Answer :
During pachytene process of meiosis crossing over between homologous chromosomes takes place. In this they homologous chromosomes exchanges their segments.
In other steps like Leptotene- condensation of chromosome take place, Diplotene- - terminalization take place and in Zygotene- pairing of homologous chromosomes takes place.
Therefore, correct option is Pachytene.
It can be better understood with the following picture:
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Match the following:
In which sub-stages of meiosis-I do the following events occur?
i) pairing of homologous chromosomes
ii) terminalization
iii) crossing over
iv) formation of spindle apparatus.
Tamil Nadu Board - ScienceThe important event of meiosis is the crossing over. It occurs during ________ .
Tamil Nadu Board - ScienceReduction division is the process by which gametes are produced. The cells in which reduction division take place are ____________ .
Tamil Nadu Board - SciencePick out the item which has sequential arrangement.
Tamil Nadu Board - ScienceIn Meiosis-I, the pairing of homologous chromosomes take place during ___________ stage.
Tamil Nadu Board - Science