Question

Turners syndrome is represented by
a) XYY
b) XO
c) XXY
d) XXX

Answer 1

In the normal condition of human chromosomes present in them are XX in females and XY in males. In turner’s syndrome, there is an abnormal presence of the X chromosome. The person having such an abnormality is not fertile.

Complete answer:
Turner syndrome is caused due to genetic abnormality present in the person. Such as the person has only a single X chromosome present instead of two XX chromosomes. This occurs only in the female child. There is nothing one can do to prevent this syndrome. The females born with this syndrome have certain physical characters like swollen hands and feet, short stature, obesity, droopy eyes, and flat feet. They may also develop some medical problems including heart defects, infertility, hearing loss, high blood pressure, and frequent ear infections. The symptoms usually appear in the infant stage of the children. The frequency of this syndrome affecting a woman is 1 of 2000. The condition can be identified using karyotyping when the baby is in the uterus.

Additional information: Sex chromosome abnormalities are caused due to the presence or absence or an extra X chromosome in a person. XXX chromosome is the trisomy X syndrome or the triple X syndrome. XXY is the Klinefelter syndrome in which there is the presence of an extra X chromosome in the male’s body. XXXX is a condition of the super female and XXYY is a condition of the super male.
So, the answer is ‘b) XO’.

Note: The person born with these sex chromosomal abnormalities can lead a normal life like normal individuals. They are infertile and can’t reproduce. Chromosomal abnormalities can also be caused due to a change in the shape of the chromosome.