Egg is liberated from ovary in
secondary oocyte stage
primary oocyte stage
oogonial stage
mature ovum stage
Acrosome reaction in sperm is triggered by
capacitation
release of lysin
influx of Na+
release of fertilizing
Meroblastic cleavage is a division which is
horizontal
partial/parietal
total
spiral
Termination of gastrulation is indicated by
obliteration of blastocoel
obliteration of archenteron
closure of blastopore
closure of neural tube
Eye lens is formed from
ectoderm
mesoderm
endoderm
ectoderni and mesoderm
Human eggs are
alecithal
microlecithal
niesolecithal
macrolecithal
In telolecithal egg the yolk is found
all over the egg
on one side
both the sides
centre
Blastopore is
opening of neural tube
opening of gastrocoel
future anterior end of embryo
found in blastula
Freshly released human egg has
one Y-chromosome
one X-chromosome
two X-chromosome
one X-chromosome and one Y-chromosome
Extrusion of second polar body from egg nucleus occurs
after entry of sperm before completion of fertilization
after completion of fertilization
before entry of sperm
without any relation of sperm entry
