What determines the sex of a child?

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Submitted by examrobotsa on

Q: 174 (SSC/NA)
What determines the sex of a child?
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question_subject: 

Science

question_exam: 

SSC

stats: 

0,40,21,40,7,12,2

keywords: 

{'chromosomes': [4, 1, 0, 1], 'parents': [3, 1, 4, 3], 'father': [15, 3, 10, 14], 'rh factor': [1, 0, 1, 0], 'child': [5, 2, 2, 8]}