Freshly released human egg has
one Y-chromosome
one X-chromosome
two X-chromosome
one X-chromosome and one Y-chromosome
Acrosome reaction in sperm is triggered by
capacitation
release of lysin
influx of Na+
release of fertilizing
Eye lens is formed from
ectoderm
mesoderm
endoderm
ectoderni and mesoderm
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
Human eggs are
alecithal
microlecithal
niesolecithal
macrolecithal
Cells become variable in morphology and function in different regions of the embryo. The process is
differentiation
metamorphosis
organisation
rearrangement
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
How many sperms are formed from a secondary spermatocyte?
4
8
2
1
Meroblastic cleavage is a division which is
horizontal
partial/parietal
total
spiral
During cleavage, what is true about cells?
nucleocytoplasmic ratio remains unchanged
size does not increase
there is less consumption of oxygen
the division is like meiosis
