Ko te ahua tino noa o te crossover chromosomal ko te whakakotahitanga homologous, i reira e rua chromosomes whai wāhi faaite raupapa tino rite. Non-homologous whakakotahitanga e taea e kino ki ngā pūtau, no te mea e taea te whakaputa i te translocations chromosomal me ngā rerekētanga iranga. Kei reira te pānga tuku iho ki te hanga o te DNA kotahi, i roto i te wehenga o te wehenga o Holliday, ka taea e te whakakotahitanga i te wehenga o Holliday, i roto i te wehenga o te wehenga o Holliday. Na reira, ka taea te whakakotahitanga i te wehenga o te DNA kotahi i roto i te wehenga o te wehenga o te wehenga o Holliday, i te wehenga o te wehenga o te wehenga o te wehenga o te DNA e rua, i te wehenga o te wehenga o te wehenga o te wehenga o te DNA kotahi, i te wehenga o te wehenga o te wehenga o te wehenga o te wehenga o te DNA kotahi.
hanganga hononga tetrahedral