nondisjunction_lines_ans

nondisjunction_lines_ans - Worksheet on non-disjunction:...

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(a) Fill in the cells below showing the NORMAL process of meiosis of the male’s sex chromosomes (The large black chromosome is the X and the smaller red one is the Y). DO NOT show crossing over. ½ of the gametes will have the X chromsome and ½ of the gametes will have a Y chromosome. Remember we are only showing the sex chromosomes, and there would be 22 other chromosomes in each of the gametes. (b) Fill in the cells below showing the process of meiosis of the male’s sex chromosomes with non- disjunction occurring during meiosis I . DO NOT show crossing over. prior to meiosis prior to meiosis sister chromatids split but two end up in both cells does not split The black chromosome is representing the large X chromosomes, and the red represents the Y- chromosome homologous pairs split sister chromatids split homologous pair does not split normally the X and Y chromosomes stay together with the first split – they are still duplicated. no sex
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This note was uploaded on 01/18/2012 for the course L 100 taught by Professor Dr.susanhengeveld during the Fall '11 term at Indiana.

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nondisjunction_lines_ans - Worksheet on non-disjunction:...

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