All of the following are true about Down syndrome except for one.
AIncidence of Robertsonian translocation is 1:1000
BMost common cause is trisomy 21
CMosaicism 21 has no association with maternal age
DExtra chromosome is of maternal origin
EIncidence increases with advanced maternal age
Which of the following translocations is not associated with Down syndrome?
At(21;21)
Bt(14;21)
Ct(15;21)
Dt(11;14)
Which of the following is not the karyotype of Turner syndrome?
A45 XO
B46,X,r(X)
C46,X,i(Xp)
D46,X, i(X) (q10)
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