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InterviewSolution
| 1. |
Explain prophase 1 |
| Answer» Prophase 1\xa0is essentially the crossing over and recombination of genetic material between non sister chromatids - this results in the genetically unidentical, haploid daughter chromatid cells.\xa0Prophase I is divided into five phases: leptotene, zygotene, pachytene, diplotene, and\xa0diakinesis.\xa0Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears. At the start of\xa0prophase\xa0I, the chromosomes have already duplicated. During\xa0prophase\xa0I, they coil and become shorter and thicker and visible under the light microscope.Prophase\xa0is the first stage of\xa0mitosis. In\xa0prophase, chromosomes condense and become visible. spindle fibers emerge from the centrosomes.In prometaphase,\tchromosomes continue to condense.\tkinetochores appear at the centromeres.\tmitotic spindle microtubules attach to kinetochores.\tcentrosomes move toward opposite poles. | |