In human, which disorder is cussed due to the absence of one of the $X$ chromosomes i.e., $45$ with $XO$ ?
Down's syndrome
Klinefelter's syndrome
Turner's syndrome
Edward's syndrome
In man sometime during gametogenesis sex chromosomes are not separated themselves on account of which chromosome number becomes $45, 47$ or $48$. In this condition which of the following genotype and phenotype is correct
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 developement 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:
In which disorder $XXY$ karyotype is present ?
The number of chromosomes in Down's syndrome is
Loss of a single chromosome produces a condition called.