First polar body is produced during the formation of
Sperm
Secondary oocyte
Oogonium
Spermatocytes
What induces the completion of the meiotic division of the secondary oocyte?
Study the flow chart. Name the hormones labelled as $A, B, C, D$ at each stage.
$A \quad B\quad C \quad D$
Blastopore is found in
The fertilization membrane during fertilization is synthesized by
Normally the gametes are disease free in human beings or even in other animals because