18 19 20 21 22

Figure 1 Normal Human Karyotype

4. Arrange the pairs according to their length. Begin with the largest chromosomes and move to the smallest.

5. Tape each pair of homologous chromosomes to a human karyotyping form. Place the centromeres on the lines provided. Place the longest chromosome at position 1, and the shortest at position 22. Place the two sex chromosomes at position 23.

6. The diagram you have made is a karyotype, as in Figure 1. Analyze your karyotype to determine the sex of the individual. Use the information in Table 1 to guide your analysis.

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