Question

Please type long answers on a separate sheet and attach to this page to hand in. 1. The five cells shown in figures a-e are all from the same individual. a) What is "n" in this organism? (0.5pts) b) Under each cell indicate i) which process depicted (mitosis, meiosis I, or meiosis II) and ii) what stage of cell division is represented. (1.25pt) A certain adult plant cell has 16 chromosomes. (1 point) (a) How many chromatids are in a cell at metaphase II of meiosis? (b) How many chromatids are in each cell at metaphase of mitosis? (c) How many chromatids are in each cell at metaphase I of meiosis? (d) How many chromosomes are in each daughter cell after meiosis I? Cytochalasin B is an inhibitor of actin polymerization. (a) If an animal cell is treated with Cytochalasin B prior to entry into M phase, what structure(s) would be affected and how? (0.5 point) (b) If you treat dividing cells with Cytochalasin B and then examine them under a microscope, what would the cells look like after M phase? (0.5 point) 4. You looked at a slide of animal cells in G2 phase under a light microscope. Can you see chromosomes? Why or why not. (1 point) 5. On the next page is an image of a lily anther... (a) circle a pollen sac with a dashed line (0.5pts) (b) point to a microsporocyte (0.5pts) (c) How many nuclei can a microsporocyte contain? (0.25pts) Circle an example depicting this (0.25pts) Scanned with CamScanner

Answer 1

Please type long answers on a separate sheet and attach to this page to hand in. 1 The five cells shown in figures a-e are all from the same individual a) What is "n" in this organism? (0.5pts 2n 6, n = 3 b) Under each cell indicate i) which process depicted (mitosis, meiosis I, or meiosis II) and ii what stage of cell division is represented. (1.25pt) а. C. anaphase 1 metaphase telophase 2 meiosis 2 anaphase mitosis metaphase 2 meiosis 1 mitosis meiosis 2 1 A certain adult plant cell has 16 chromosomes. (1 point) (a) How many chromatids are in a cell at metaphase II of meiosis? 6 (b) How many chromatids are in each cell at metaphase of mitosis? 2 (c) How many chromatids are in each cell at metaphase I of meiosis? 2 (d) How many chromosomes are in each daughter cell after meiosis I? 3 3. Cytochalasin B is an inhibitor of actin polymerization. (a) If an animal cell is treated with Cytochalasin B prior to entry into M phase, what structure(s) would be affected and how? (0.5 point) nothing will happen (b) If you treat dividing cells with Cytochalasin B and then examine them under a microscope, what would the cells look like after M pha contractile ring will not be formed (0.5 point) You looked at a slide of animal cells in G2 phase under a light microscope. Can you see chromosomes? Why or why not. (1 point) 4. chromatin will be present

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