Extrusion of second polar body from egg nucleus occurs
after entry of sperm but before fertilization
after fertilization
before entry of sperm into ovum
simultaneously with first cleavage
Corpus luteum is a mass of cells found in
What is the correct sequence of sperm formation?
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 |
Give scientific reasons : The spermatids are transformed into spermatozoa by the process called spermiogenesis.
Select the correct option of haploid cells from the following groups