Question

A man with extra X-chromosome suffers from
A. Down’s syndrome
B. Klinefelter’s syndrome
C. Bleeder’s syndrome
D. Turner’s syndrome

Answer 1

Down’s syndrome and Bleeder’s syndrome are not gender-specific genetic disorders. Klinefelter’s syndrome and Turner’s syndrome, on the other hand, gender-specific genetic disorders affect only males and females respectively.

Complete answer: In option A, Down’s syndrome is mentioned. In this genetic disorder, there exists a third copy of chromosome 21 in the infected person’s DNA. The copy could be of the whole chromosome or just a part of it. The genetic disorder causes delay in physical, intellectual disability ranging from mild to moderate and characteristic facial features.
In option B, Klinefelter’s syndrome is mentioned. Generally, a normal female has 46 chromosomes in which the sex chromosome is XX and males have XY sex chromosome. But a person suffering from Klinefelter’s syndrome will experience an unusual grouping of sex chromosomes. The males will have an extra X sex chromosome. This is not inherited. The addition of this chromosome affects the fertility and physical features of males. They experience less sex drive and very sparse body hair.
In option C, Bleeder’s syndrome is mentioned. It is also known as Hemophilia. This is a very dangerous genetic disorder as it results in the impairment of the blood clotting system in human beings. It is a genetic disorder.
In option D, Turner’s syndrome is mentioned. This genetic impairment only happens in females. In this disorder a female is born with only one X chromosome, lacking in one sex chromosome. So, it is a chromosomal disorder. This affects puberty, fertility, intellectual disabilities, and many more.
Hence option B is correct.

Note: Klinefelter’s syndrome can be treated in many ways. The males can undergo breast removal surgery. Fertility treatment can solve the problem of infertility. Androgens can be taken orally to increase their concentration in the body. Speech treatments can also be provided.