$A$ condition characterized by not having an exact number of chromosomes in a diploid set is called

The person with Klinefelter's syndrome has which of the following chromosomal constitutions?

$21$ trisomy in humans causes

Euploidy is best explained by

$A$ 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?

The number of sex chromosomes is normal in