Which of the two, sperm or egg cell (ovum), decides the sex of the child?
The changes in which layer or membrane of ovum check the entry of additional (more than one) sperms?
Number of chromosome in human sperm or ovum is 23.
Choose the odd one in each of the following :
(a) Sperm; implantation; fertilisation; ovum; afterbirth.
(b) Relaxin; cervix dilates; amniotic sac ruptures; child birth; follicle.