Meiosis can be observed in
Primary spermatocytes
Secondary spermatocytes
Both $A$ and $B$
Mature sperm
Meridional cleavage results in blastomeres numbering
Foetal membranes provide
Given below is a diagrammatic sketch of a portion of human male reproductive system. Which of the following part contributes to the maximum portion of semen?
How many sperms are formed by four primary spermatocytes?
The branch of embryology which concerns with the study of abnormal embryonic development is termed as