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Transcript
honors Biology Unit 11 cell division Name: _______________________ homework 3 – mitosis Label each statement below with the stage of mitosis or the cell cycle that it describes. Answers may be used once, more than once, or not at all. USE YOUR TEXT! ____1. In this phase the nuclear membrane disappears and chromosomes are visible for the first time. a. Prophase ____2. DNA is in chromatin form. b. Cytokinesis ____3. SAC are now moving towards the poles c. Anaphase ____4. d. Metaphase DAC are lined up at the equator of the cell. ____5. Cytoplasm divides in two. e. Interphase ____6. f. Telophase Centromeres are broken as spindles fibers contract and shorten. ____7. Identical chromatids are at the poles ____8. Nuclear membranes are reforming around daughter nuclei ____9. In this phase, spindle fibers begin to form and centrioles start to move towards the poles. ____10. Spindle fibers are disappearing ____11. DNA replicates. Answer the following questions about the cells pictured below. A B C 12) What phase of mitosis is Cell A in? Describe what happened JUST BEFORE this picture was taken. ______________________________________________________________________ ___________________________________________________________________________ 13) What phase of mitosis is cell B in? How did you know? _______________________________ _____________________________________________________________________________________ _________________________________________________________________ 14) What phase of mitosis is cell C in? What form of DNA is found in this picture? _____________________________________________________________________________________ _________________________________________________________________ Fill in the answers to the following questions. THINK!! In all cases, the cells are dragon in origin. Dragons have a diploid number of 16. Diploid is 2n, or the total number of chromosomes in both sets of chromosomes. _______ 15) How many chromosomes are in a female dragon’s muscle cell that is in metaphase of mitosis? What kind of chromosomes? (SAC or DAC?) _______ 16) How many chromosomes are in a male dragon’s toe cell that is in anaphase of mitosis? _______ 17) What kind of chromosomes are found in #16? (SAC or DAC?) _______ 18) How many chromatin pieces are in grandma dragon’s skin cell that healed a paper cut?