That it principle remains today the most popular cause to your relationships between hereditary crossing-over and you may cytological noticed chiasmata
So it idea states that earliest chiasma is formed right after which crossing over takes place. The brand new genetic crossing over happens down to physical filter systems imposed from the chiasma creation. The chiasma is made at the diplotene stage of meiosis and you can crossing more happen anywhere between diplotene and you can anaphase.
That it idea is proposed of the lanssens and later sitios de citas negros más populares toward elaborated because of the Belling and Darlington. According to which theory, first crossing over happens and chiasma is made. The fresh new crossing over happens sometimes throughout the early meiotic levels, perhaps from the pachytene, when homologous chromatids is closely coordinated.
Which theory are recommended of the Belling. It theory says the entire recombinant section otherwise part pops up in the recently synthesised part. Brand new non-aunt chromatids when come in personal get in touch with it content some section each and every other leading to recombination. (suite…)
