GK
SOIL AND AGRICULTURE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
The crossing over occurs during-
|
|
Zygotene
|
|
|
Pachytene
|
|
|
Leptotene
|
|
|
Diplotene
|
Explanation:
Detailed explanation-1: -Crossing over occurs during pachytene stage between non sister chromatids of a pair of homologous chromosomes. Diplotene is characterised by appearance of chiasma marking the locations at which crossing over has already occurred in the pachytene stage.
Detailed explanation-2: -Crossing over is a cellular process that happens during meiosis when chromosomes of the same type are lined up.
Detailed explanation-3: -Pachytene is the third stage of meiosis prophase-1 (a five-stage process). It is preceded by the zygotene stage, where synapsis, i.e. pairing of homologous chromosomes take place. Recombination or crossing over takes place at this stage.
Detailed explanation-4: -So, the correct answer is Pachytene.
There is 1 question to complete.