Q. 34.6( 9 Votes )
The prophase I st
Recombination or crossing over is occurring in the pachytene stage of Prophase 1 of Meiosis 1. Hence some part of chromosomes gets exchanged.
r-DNA molecules are formed by the joining together of DNA molecules from different sources. Thus, prophase stage 1 contributes to r-DNA formation.
The following diagram shows how a crossover takes place.
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