In humans, at the end of the first meiotic division, the male germ cells differentiate into the

  • A

    Primary spermatocytes

  • B

    Secondary spermatocytes

  • C

    Spermatids

  • D

    Spermatogonia

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Match the columns.

Column $I$ Column $II$
$(a)$ Multiplier phase $(1)$ Undeveloped primary oocyte
$(b)$ Growth phase $(2)$ Primary oocyte filled with developed cytoplasm
$(c)$ Maturation 1 $(3)$ Secondary oocyte
$(d)$Maturation 2 $(4)$ Germinal epithelial cells


 

During the development of an embryo, migration and rearrangement of cells lead to a pattern formation known as

In mammals the female secondary sexual characters are developed by the hormone