VGO-0045
QUESTION
The calf affected with Klinefelter syndrome possesses which of the gene pairs?
OPTIONS
(A) XXY
(B) XYY
(C) XXX
(D) None of the above
ANSWER
(A) XXY
EXPLANATION
Klinefelter syndrome is associated with an additional X chromosome in an otherwise male sex-chromosome complement, conventionally represented as XXY. This can impair testicular development and fertility. XYY represents a different sex-chromosome aneuploidy, and XXX describes an additional X chromosome in a female complement. Since XXY is specifically listed, none of the above is inappropriate.
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Veterinary Gynaecology and Obstetrics · 240 Questions
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