Average Weather in September in Newport East Rhode Island, United States. In Newport East, the month of September is characterized by falling daily high temperatures, with daily highs decreasing by 8Â°F, from 75Â°F to 67Â°F over the course of the month, and rarely exceeding 82Â°F or dropping below 59Â°F.
Recombination is an integral part of the pairing of homologous chromosomes. It occurs between non-sister chromatids during the pachytene stage of meiosis I (the first stage of meiosis) and possibly before, when the homologous chromosomes are aligned in zygotene (Fig. 8.3).
Crossovers occur when homologous chromosomes are. aligned: chromatids from two different chromosomes can. exchange segments as in Fig. 3. In Fig. 3a, chromatids from. two homologous chromosomes come in contact at an. equivalent point along their lengths.