Final answer:
The XXY genotype corresponds to Klinefelter syndrome, causing males to exhibit symptoms like small testes and learning difficulties due to an extra X chromosome.
Step-by-step explanation:
The genotype XXY corresponds to Klinefelter syndrome, which is a chromosomal disorder. In Klinefelter syndrome, a male is born with an extra copy of the X chromosome. Individuals with this condition typically display physical characteristics such as small testes, enlarged breasts, reduced body hair, and may have difficulties with learning. Every additional X chromosome undergoes inactivation, seen as Barr bodies in the cell nucleus, to compensate for the extra genetic material.