Question

Sex in human embryos is determined by:

• A. ‘X’ chromosome of egg
• B. ‘X’ or ‘Y’ chromosome of sperm
• C. Only ‘Y’ chromosome of sperm
• D. Health of mother

Answer 1

Answer: (B)

‘X’ or ‘Y’ chromosome of sperm

Answer 2

The sex of a human embryo is determined by the chromosome carried by the sperm. If it carries an X chromosome, the offspring will be female (XX); if it carries a Y chromosome, the offspring will be male (XY).