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B
XX
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C
YY
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D
XXYY
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Solution
The correct option is A XY The sex chromosomes in the male are indicated by XY. The XY sex determination system is the sex-determination system found in humans.
In this system, the sex of an individual is determined by a pair of sex chromosomes (gonosomes). Females have two of the same kind of sex chromosome (XX) and are called as the homogametic sex. Males have two distinct sex chromosomes (XY) and are called as the heterogametic sex.