By which the sex of a child is determined before birth ?

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Submitted by examrobotsa on

Q: 24 (SSC/NA)
By which the sex of a child is determined before birth ?

question_subject: 

Science

question_exam: 

SSC

stats: 

0,2,15,13,2,2,0

keywords: 

{'sperms': [1, 0, 0, 0], 'foetus': [2, 0, 0, 0], 'birth': [11, 1, 4, 9], 'nutrition': [6, 0, 6, 3], 'father': [15, 3, 10, 14], 'child': [5, 2, 2, 8], 'sex': [4, 2, 1, 1], 'mother': [4, 3, 4, 7]}