If somatic cells of a human male contain single barrbody, the genetic composition of the person would be
$XYY$
$XXY$
$XO$
$XXXY$
Chimera is produced due to
Epicanthus is the symptom of
When two unrelated individuals or lines are crossed, the performance of $F_1$ hybrid is often superior to both its parents. This phenomenon is called
The recessive genes located on $X$-chromosome in humans are always
The mule is a