Fraternal twins in man are produced when
Two sperms fertilize an ovum and the first two blastomeres separate from each other
One sperm fertilizes an ovum and first two blastomeres separate from each other
Egg develops parthenogenetically and first two blastomeres separate from each other
Two ova are fertilized simultaneously
If ovaries of a pregnant mammal are removed
In human female the blastocyst
Write a note on pregnancy and embryonic development in human beings.
Choose the correct pair -
The point of sperm entry during fertilization forms