Principle of Inheritance and VariationMedium
Question
In Down′s syndrome of a male child, the sex complement is
Options
A.XO
B.XY
C.XX
D.XXY
Solution
The cause of Down′s syndrome is non-disijunction of 21st chromosome during oogenesis. This chromosomal abnormality is related with autosome so the sex complement of a male child in this syndrome will be XY.
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