Final answer:
A karyotype with an XXY genotype indicates the presence of Klinefelter syndrome, which is a condition in phenotypically male individuals with certain physical traits and potential learning difficulties.
Step-by-step explanation:
Karyotype and Corresponding Syndromes
When evaluating a karyotype to determine which condition it represents, understanding the chromosomal configuration is key. The XXY genotype is associated with Klinefelter syndrome, which is characterized by male individuals with certain physical features such as small testes, enlarged breasts, and reduced body hair. This condition may also include longer limbs and learning difficulties. In contrast, Turner syndrome is represented by an XO genotype and leads to a phenotypically female individual with traits such as short stature and sterility. When considering Down syndrome, it is identified by the presence of an extra chromosome 21, not by an abnormal sex chromosome number.
Based on the information provided, if an individual has a karyotype characterized by the XXY chromosome complement, that person has Klinefelter syndrome, not Turner syndrome, Down syndrome, or any other chromosomal disorder. Therefore, the individual represented by the karyotype with an XXY genotype would be a male with Klinefelter syndrome and not the other listed conditions.