i) What is synaptonemal complex?

ii) Explain the significance of crossing over with diagram. In which phase of cell division this process takes place?

Dear Student,

(i) The synaptonemal complex is a protein structure formed between two homologous chromosomes during meiosis. The synaptonemal complex  mediates chromosome pairing or synapsis.

(ii) Crossing over occurs during Prophase I of meiosis. Crossing is mainly responsible for the genetic difference. Crossing over is the exchange of genetic material between two homologous chromosomes with the help of enzyme recombinase. It results in recombinant homologous chromosomes.

Hope it is clear to you now,

Cheers!!

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