Draw two different ways which nondisjunction during meiosis can produce a child with Turner’s syndrome (monosomy X). Label the X and Y chromosomes in your drawings. Show only the sex chromosomes. Both of the drawings could be people of the same sex or they could be one of each sex, it is up to you.

                                             Drawing A                                                                                        Drawing B

 Use these drawings to answer questions 1-5 on the next page.
1.             The X and Y chromosomes should be clearly labeled in your drawings above. You cannot receive points for this quiz unless the X and Y chromosomes are labeled.

 2.             State the sex of the person undergoing meiosis in drawing A above.

 3.             State the sex of the person undergoing meiosis in drawing B above.  

4.     Which gametes (A through H) will produce Turner’s syndrome if it fuses with a normal gamete? You should identify at least one gamete from each of the two drawings to answer this question.

5.             What sex chromosomes are present in a normal gamete that must fuse with the gamete selected in question 4  to produce a child with Turner’s syndrome.

Draw two different ways which nondisjunction during meiosis can produce a child with Klinefelter’s syndrome (XXY). Label the X and Y chromosomes in your drawings. Show only the sex chromosomes. Both of the drawings could be people of the same sex or they could be one of each sex, it is up to you.

                                             Drawing A                                                                                        Drawing B

 Use these drawings to answer questions 1-5 on the next page.
1.             The X and Y chromosomes should be clearly labeled in your drawings above. You cannot receive points for this quiz unless the X and Y chromosomes are labeled.

 2.             State the sex of the person undergoing meiosis in drawing A above.

 3.             State the sex of the person undergoing meiosis in drawing B above.

 4.     Which gametes (A through H) will produce Klinefelter’s syndrome if it fuses with a normal gamete? You should identify at least one gamete from each of the two drawings to answer this question.

 5.             What sex chromosomes are present in a normal gamete that must fuse with the gamete selected in question 4  to produce a child with Klinefelter’s syndrome.