Genetic recombination in bacteria

1. Genetic
Recombination II M.Sc.
GENETICS
Dr. M. PAVUNRAJ
INSTRUCTOR

21. Breakage and reunion In genetics, the established
model of crossing-over by the physical breakage and
crosswise reunion of broken chromatids during the
pairing of homologous chromosomes at
the prophase I stage of meiosis. The points at which
chromosomes cross over are termed chiasmata. The
result of crossing-over is the mutual exchange
between chromatids of parts which contain
corresponding loci.

23. Crossing-over The exchange of genetic material
between homologous chromosomes by breakage and
reunion. This occurs during pairing of chromosomes at
prophase I of meiosis, and in some organisms (for example
certain fungi, and insects such as Drosophila) may also
occur at mitosis. The temporary joins between
chromosomes during crossing-over are called chiasmata.