Why the sperm of male determines the sex of the embryo?

Due to the presence of X or Y chromosome.

The correct answer is Option (4) -Due to the presence of X or Y chromosome.

The sperm of the male determines the sex of the embryo due to the presence of either an X or a Y chromosome. Here's the explanation:

• Human sex determination follows the XY system.
• Females have two X chromosomes (XX), while males have one X chromosome and one Y chromosome (XY).
• During reproduction, the female egg always contributes an X chromosome because females only have X chromosomes.
• The male sperm, however, can carry either an X or a Y chromosome.
• If the sperm that fertilizes the egg carries an X chromosome, the resulting embryo will be female (XX).
• If the sperm carries a Y chromosome, the embryo will be male (XY).

Therefore, the sex of the embryo is determined by whether the sperm contributes an X or Y chromosome, not by the acrosome or other factors.