Photos © Nasser Rusan",
fb0:"Interphase is characterized by an intact nuclear envelope, nucleoli, and a barely discernable tangle of chromatin. During the S phase of interphase, the nucleus replicates its DNA and centrosomes.",
fb1:"Notice that this image shows an intact nuclear envelope, nucleoli, and a barely discernable tangle of chromatin."};
termdef[1] = {t:"Prophase",q:"
Photos © Nasser Rusan
",
fb0:"During prophase, the chromatin coils and supercoils, becoming more and more compact and eventually condensing into visible chromosomes. The chromosomes consist of identical, paired chromatids.",
fb1:"Notice the compact chromatin and the intact nuclear envelope."};
termdef[2] = {t:"Prometaphase",q:"Photos © Nasser Rusan
",
fb0:"During prometaphase, the nuclear envelope breaks down, and kinetochore microtubules appear and connect the kinetochores with the centrosomes.",
fb1:"Notice the disruption of the nuclear envelope and the appearance of kinetochore microtubules."};
termdef[3] = {t:"Metaphase",q:"Photos © Nasser Rusan
",
fb0:"In metaphase, the centromere regions connecting paired chromatids become aligned in a plane at the cell’s equator.",
fb1:"Notice that this image shows chromatids aligned in a plane at the cell’s equator."};
termdef[4] = {t:"Anaphase",q:"Photos © Nasser Rusan
",
fb0:"During anaphase, the centromere pairs separate, and the new chromosomes (each containing one member of one of the sets of paired chromatids) begin to move towards the poles.",
fb1:"Notice that this image shows separate centromere pairs, and that the chromosomes are moving towards the pole."};
termdef[5] = {t:"Telophase",q:"Photos © Nasser Rusan
",
fb0:"During telophase, the separating chromosomes reach the poles. Telophase passes into the next interphase as the nuclear envelopes and nucleoli re-form and the chromatin becomes diffuse.",
fb1:"Notice the separating chromosomes almost reaching the poles."};
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Textbook Reference: Key Concept 11.3 Eukaryotic Cells Divide by Mitosis, p. 222