Question

The basis of Turner's syndrome and superfemales are the characteristics of which of the following sex chromosomes?
A. XO and XXX
B. XXX and XYY
C. XXXY and XXYY
D. None of the above

Answer 1

Hint: Aneuploidy is a generic term used to give information regarding the number of chromosomes present in a cell. It is the condition that arises when the number of chromosomes that should be ideally present in a cell is either less or more. These conditions give rise to several genetic disorders.

Complete answer: Turner’s syndrome is a genetic condition that arises due to the deletion of one sex chromosome, so that instead of the ideal 46 chromosomes, out of which two are essentially sex chromosomes (XX in females and XY in males), there are 45 chromosomes (XO). It is a relatively rare disorder that causes abnormal sexual development in human females. People having this condition are short, have a small chin, prominent epicanthal folds, and a webbed neck.

Another genetic disorder i.e. the condition with the triple-X chromosome (XXX), is reported in some females. The patients have a normal feminine appearance and are known as superfemales. It is reported that the fertility rate of superfemales is relatively low. Apart from this, they are often taller, than normal females (46 + XX).

So, the correct answer is option A. XO and XXX.

Note: There is no cure for Turner’s syndrome as of now, although treatment may be helpful to deal with the symptoms. It is noteworthy, that the triple X syndrome is not a hereditary disorder.