MCQ
All chordates at one or the other stage possess
- AVertebral column
- ✓Pharyngeal gills-slits
- CTwo pairs of pentadactyle limb
- DA movable jaw
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$A$. 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.
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