In indeterminate cleavage the fate of blastomeres is fixed at which of the following stage
Blastula
Gastrulation
$32$ -celled stage
$64$ -celled stage
Where does fertilisation take place in human beings ? What changes occur in egg cell (ovum) during fertilisation ?
Fraternal twins in man are produced when
Which one of the following statements about morula in humans is correct?
Implantation of egg is followed by
Fertilization is