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.
Fertilizins are emited by:
Immature eggs
Mature eggs
Sperms
Polar bodies
Freshly released human egg has:
One Y-chromosome
One X- chromosome
Two-X chromosome
Both (a) and (b)
Eye lens is formed from:
Ectoderm
Mesoderm
Endoderm
Human eggs are:
Alecithal
Microlecithal
Mesolecithal
Macrolecithal
Cells become variable in morphology and function in different regions of the embryo. The process is:
Differentiation
Metamorphosis
Organization
Rearrangement
How many sperms are formed from a secondary spermatocyte?
4
8
2
1
Extra-embryonic membranes of the mammalian embryo are derived from:
Inner cell mass
Trophoblast
Formative cells
Follicle cells
The mammalian corpus luteum produces:
Estrogen
Progesterone
Luteotropic hormone
Luteinizing hormone
What is true about cleavage in fertilized egg of human ?
Meroblastic
Starts when egg reaches uterus
Starts in fallopian tube
It is identical to normal mitosis
