Which of the following undergoes, the meiosis-I division?
Primary spermatocytes
Secondary spermatocytes
Sertoli cell
Leydig cell
$A$ : Middle piece of sperm is called powerhouse.
$R$ : It contains mitochondria.
Draw a labeled diagram of a section through ovary.
Match the columns.
Column $I$ | Column $II$ | ||
$(a)$ | Mens pubis | $(1)$ | Embryo development |
$(b)$ | Antrum | $(2)$ | Sperm cell |
$(c)$ | Trophoblast layer | $(3)$ | External genitals offemale |
$(d)$ | Mitochondria | $(4)$ | Graafian follicle |
Melotic division of the secondary oocyte is completed
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is