Question

A sex-linked chromosomal abnormality that is characterized by a male having an extra X chromosome. A man with this disorder typically has underdeveloped testes, a high risk of sterility, and frequently develop small breasts. Some learning disabilities can result.

A. Klinefelter's Syndrome
B. Fragile X Syndrome
C. Turner Syndrome
D. Sickle cell anemia
E. Tay Sachs Disease

Answer 1

Klinefelter's Syndrome is the condition where a male has an extra X chromosome leading to symptoms like small testes, possible sterility, and learning challenges.

Step-by-step explanation:

The sex-linked chromosomal abnormality characterized by a male having an extra X chromosome is Klinefelter's Syndrome. Individuals with this condition, typically designated as having an XXY genotype, present with a range of physiological and developmental effects. These can include small testes, the possibility of sterility, and sometimes developing small breasts. Klinefelter's Syndrome may also be associated with learning disabilities. Cellular mechanisms compensate for the extra X chromosome by inactivating it, although it may still express a few genes.