Question

crossing over occurs between .....?.
sister chromatids of the same chromosomes
two different bivalents
non sister chromatids of a bivalents
two daughter nuclei ....
answer me plz me telling correct option​

Answer 1

A bivalent is formed due to the formation of synaptonemal complex formed between two homologous chromosomes (4 chromatids)

A homologous chromosome is made up of two sister chromatids

Crossing over takes place between 2 non sister chromatids of two homologous chromosomes