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B
XX-XO type
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C
XX-XY types
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D
XO-XX
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Solution
The correct option is C XX-XY types In humans, the males are heterogametic as they have XY sex chromosomes, so they make 50% sperms with X chromosome and 50% sperms with Y chromosome. Females are homogametic. All gametes made by them have X chromosomes. So, humans show XX-XY type of sex determination.