(A) chiasmata is an $X$-shaped structure that forms at the site where crossing over occurs between non-sister chromatids of homologous chromosomes dur

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The site of crossing over between two chromatids of homologous chromosomes.

(A) chiasmata is an $X$-shaped structure that forms at the site where crossing over occurs between non-sister chromatids of homologous chromosomes during the pachytene stage of prophase-$I$ of meiosis. It becomes clearly visible during the diplotene stage as the homologous chromosomes begin to separate.

Class 11 Biology Cell Cycle and Cell Division Meiosis

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What is a chiasmata?

A
The site of crossing over between two chromatids of homologous chromosomes.
B
The site of crossing over between two chromatids of non-homologous chromosomes.
C
The site of formation of a complex structure like synaptonemal complex.
D
$A$ chiasmata formed between chromatids of the same chromosome.