Question

Explain how sex is determined in human babies.

Answer 1

• Sex determination in humans takes place by XY system.
  
• The sperm and ovum fuse to form a zygote.
  
• Females give rise to an X chromosome in the gamete and males can give rise to either X or Y in the gamete.
  
• Among the million sperms, the type of sperm that fuses with the ovum determines the sex in the human babies.
  
• XX combination gives rise to the female sex and the XY combination gives rise to the male sex.