GEN-3000 Lecture Notes - Lecture 2: Cytosol, Haemanthus, Gametophyte
31 Aug 2020
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3: cells lack nuclear envelope and membranous organelles, genetic material, long, circular dna molecule compacted into nucleoid area, color-enhanced electron micrograph of e. coli undergoing cell division. Note that the shape of the chromosome during. 7: human mitotic chromosomes photography, cut out of print, and matched up for display, a metaphase preparation of chromosomes derived from a dividing cell of a human male (right), and the karyotype derived from the metaphase preparation (left). X and y chromosomes are present in homologous pairs. Each chromosome is clearly a double structure consisting of a pair of sister chromatids joined by a common centromere. All but the x and y chromosomes are present in homologous pairs. Following mitosis, cells enter the g1 stage of interphase, initiating a new cycle. Cells may become nondividing (g0) or continue through g1, 10 where they become committed to begin d n a synthesis (s) and complete the cycle (g2 and mitosis).
