In a diploid set of chromosomes,the deletion or addition of a chromosome leads to:

In humans,which disorder is caused due to the absence of one of the $X$ chromosomes,i.e.,$45$ with $XO$?

The formation of multivalents at meiosis in a diploid organism is due to

Gynaecomastia is the symptom of

The affected individuals are short-statured in disorders like:

$A$ pregnant woman who has undergone an amniocentesis test finds an extra $Barr$ body in her embryo. Which syndrome is likely to be associated with the embryo?