Chiasmata are formed due to

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(A) Chiasmata are $X$-shaped structures that form between homologous chromosomes during the diplotene stage of prophase-$I$ of meiosis. They represent

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Crossing over of same part between homologous chromosomes

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(A) Chiasmata are $X$-shaped structures that form between homologous chromosomes during the diplotene stage of prophase-$I$ of meiosis. They represent the sites where crossing over has occurred,which involves the exchange of genetic material between non-sister chromatids of homologous chromosomes. As the synaptonemal complex dissolves,the homologous chromosomes begin to separate but remain attached at these crossover points,known as chiasmata.

List-$I$ (Phase of meiosis)	List-$II$ (Event that occurs)
$1$. Prophase $I$	Crossing over occurs
$2$. Metaphase $I$	Sister chromatids migrate to opposite poles
$3$. Anaphase $I$	Homologous chromosomes line up at the equator in pairs

Similar Questions

What is the number of chromatids in a bivalent of homologous chromosomes during synapsis?

$A$: Each chromosome of a bivalent attaches with two spindles in metaphase.
$R$: In metaphase,bivalents migrate towards the metaphasic plate.

What happens during the process of crossing over?

Chiasmata formation occurs during

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