What induces the completion of the meiotic division of the secondary oocyte?
Contact of the sperm with the zona pellucida layer of the ovum
The entry of the sperm into the cytoplasm of the ovum through the zona pellucida and the plasma membrane
Entry of the sperm in the ampullary-isthmic junction
Copulation
How many cleavages are completed in $16$ celled stage of egg.
The following graph of relative concentrations of the four hormones present in the blood plasma of a woman during her menstrual cycle. Identify the hormones $A, B, C$ and $D$
Seminiferous tubules develop central lumen after
Heterogametic male condition does not occur in
The best definition of the process of gastrulation is that, it is a process where the