BIOL 102 Lecture Notes - Lecture 18: Sister Chromatids, Nuclear Membrane, Kinetochore
25 Jun 2016
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O the microtubules pull the chromosomes to align them along the metaphase plate o sister chromatids are bound to kinetochore microtubules on opposite spindles: anaphase o centromeres holding the identical chromatids together separate o the kinetochore microtubules begin shortening, pulling the sister chromatids to opposite sides of the cell o makes sure that each daughter cell will receive one of each chromosome, telophase o nuclear envelope reforms o chromosomes reach the poles o chromatin becomes diffuse, cytokinesis o. Muscle cells have many nuclei (syncytial) because they undergo mitosis without cytokinesis: ploidy o n = a set of chromosomes that includes exactly one of each homologue o multiples of n are named. Meiosis ii: acts just like mitosis, except that the four daughter cells formed each contain a mixture of genetic material from each parent, cells can arrest in meiosis for a very long time o 40 years in meiotic prophase i for some human female eggs.
