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

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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]}

The correct answer is option 2, which states that the sex of a child is determined by the foetus of the mother before birth. This means that the chromosomes present in the embryo determine the sex of the child.

Option 1, which suggests that the sex is determined by the father`s sperm, is not entirely correct. While the father`s sperm carries either an X or Y chromosome, it is ultimately the combination of the father`s sperm and mother`s egg that determines the sex of the child.

Option 3, which suggests that both the father`s sperm and the mother`s foetus determine the sex, is incorrect. The father`s sperm only contributes the sex chromosomes, while the mother`s foetus does not have any role in determining the child`s sex.

Option 4, which implies that the mother`s nutrition determines the sex of the child, is incorrect and not related to the determination of sex.

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