Q.135. Crossing over occurs between
(1) Sister chromatids of homologous chromosomes
(2) Non-sister chromatids of non-homologous chromosomes
(3) Non-sister chromatids of homologous chromosomes
(4) Sister chromatids of non-homologous chromosomes

Dear student

Please refer the solution below for the said query


The correct option is (3).

Crossing over occurs between the non sister chromatids of homologous chromosomes. It involves exchange of genetic material during gamete formation. 


Hope this information clears your doubt about the topic.

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