Development of feminine characters and no spermatogenesis are characteristic feature of people with __________.

Step-by-step solution

Klinefelter's syndrome is a genetic disorder caused by the presence of an extra X chromosome in males, resulting in a 47, XXY karyotype. Individuals with this syndrome are genetically male and have overall masculine development, but the extra X chromosome leads to the development of some feminine characteristics, such as gynecomastia (breast development). They also have underdeveloped testes, which leads to an absence of spermatogenesis, making them sterile. Answer: Klinefelter's syndrome