Epicanthal skin fold and simian crease are characteristics of

Which of the following statements are correct about Klinefelter's Syndrome?
$A$. This disorder was first described by Langdon Down $(1866)$.
$B$. Such an individual has overall masculine development. However,the feminine development is also expressed.
$C$. The affected individual is short statured.
$D$. Physical,psychomotor and mental development is retarded.
$E$. Such individuals are sterile.
Choose the correct answer from the options given below:

The condition of sex chromosomes in a male child with Down's syndrome will be:

What is a change in the number of chromosomes called?

The given figure represents which disorder?

In which of the following disorders does an affected individual possess $47$ chromosomes?