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(D) In $Klinefelter 	ext{ syndrome}$, the chromosomal constitution is $44 AA + XXY$. This condition results in individuals who are phenotypically mal

Vedclass · Accepted Answer

$I - 	ext{Klinefelter syndrome}, II - 44 AA + XXY, III - 	ext{Tall thin eunuchoid}$

Vedclass · Answer

(D) In $Klinefelter 	ext{ syndrome}$, the chromosomal constitution is $44 AA + XXY$. This condition results in individuals who are phenotypically male but have some female characteristics, such as breast development (gynecomastia) and a tall, thin, eunuchoid stature. Option $A$ is incorrect because $XO$ represents $Turner's 	ext{ syndrome}$, not $Thalassemia$. Option $B$ is incorrect because $Down's 	ext{ syndrome}$ has $45 AA + XY$ (trisomy $21$), and webbing of the neck is a feature of $Turner's 	ext{ syndrome}$. Option $C$ is incorrect because $44 AA + XXX$ is $Triple-X 	ext{ syndrome}$, and anaemia/jaundice are symptoms of $Thalassemia$.

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