Freshly released human egg has
one Y-chromosome
one X-chromosome
two X-chromosome
one X-chromosome and one Y-chromosome
Amount of yolk and its distribution are changed in the egg. Which one is affected?
pattern of cleavage
formation of zygote
number of blastomeres
fertilization
Eye lens is formed from
ectoderm
mesoderm
endoderm
ectoderni and mesoderm
In telolecithal egg the yolk is found
all over the egg
on one side
both the sides
centre
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
Gonads develop from embryonic
both mesoderm and endoderm
Fertilizins are emitted by
immature eggs
mature eggs
sperms
polar bodies
Acrosome reaction in sperm is triggered by
capacitation
release of lysin
influx of Na+
release of fertilizing
Termination of gastrulation is indicated by
obliteration of blastocoel
obliteration of archenteron
closure of blastopore
closure of neural tube
How many sperms are formed from a secondary spermatocyte?
4
8
2
1
