Final answer:
Sterile females typically associated with Turner syndrome possess a single X chromosome, known as the XO genotype, leading to specific physical characteristics and infertility.
Step-by-step explanation:
The genetic makeup of sterile females, as characterized in Turner syndrome, is XO (Option 3). This means they have a single X chromosome and no second sex chromosome.
Turner syndrome is a condition resulting from nondisjunction during meiosis, which leads to the XO chromosome complement rather than the typical XX or XY. Infertile females with Turner syndrome exhibit specific physical traits, such as short stature and webbed skin, and also suffer from hearing and cardiac impairments.
The absence of all or part of a second sex chromosome in individuals with Turner syndrome sets this condition apart from others like Klinefelter syndrome (XXY) that affect males.