The fertilized egg divides by the process of
Regeneration
Oogenesis
Cleavage
Invagination
Sex of baby has been decided at which stage ?
Which one of the following statements about human sperm is correct?
Unfertilized egg of human contains or When released from ovary, human egg contains
Receptors for sperm binding in mammals are present on :
Explain : When and how the sex of the baby is determined ?