 
 <translate> Q: Passage: Chromosomal crossover (or crossing over) is the exchange of genetic material between homologous chromosomes that results in recombinant chromosomes during sexual reproduction. It is one of the final phases of genetic recombination, which occurs in the pachytene stage of prophase I of meiosis during a process called synapsis. Synapsis begins before the synaptonemal complex develops and is not completed until near the end of prophase I. Crossover usually occurs when matching regions on matching chromosomes break and then reconnect to the other chromosome.

Question: Based on this passage, when does the crossing over occur in meiosis? Let's give stream of consciousness first: <hau> Q: Shigewa: Halin hawan chromosomal (ko ƙetare) shine musayar kayan kwayar halitta tsakanin homologous chromosomes wanda ke haifar da chromosomes masu haɗuwa yayin haifuwa ta jima'i. Yana daya daga cikin matakai na ƙarshe na sake haɗuwa da kwayoyin halitta, wanda ke faruwa a cikin matakin pachytene na prophase I na meiosis a lokacin wani tsari da ake kira synapsis. Synapsis yana farawa kafin tsarin synaptonemal ya bunkasa kuma ba a kammala ba har zuwa kusa da ƙarshen prophase I. Crossover yawanci yakan faru ne lokacin da yankuna masu dacewa a kan daidaitaccen chromosomes karya sannan kuma su sake haɗuwa da sauran chromosome.  Tambaya: Bisa ga wannan nassin, a wane lokaci ne ƙetarewar zai faru a cikin meiosis? Bari mu ba da rafi na sani na farko: 