At what stage the primitive streak in the chick embryo is formed
At what stage the primitive streak in the chick embryo is formed
- A
$12$ hours incubation
- B
$18$ hours incubation
- C
$72$ hours incubation
- D
$24$ hours incubation
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In humans, what is the ratio of the number of gametes produced from one male primary sex cell to the number of gametes produced from one female primary sex cell ?
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- [AIIMS 2009]
During the fourth and sixth cleavage of the zygote
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- [AIIMS 1993]
In ladies, the oviducts are cutted or removed surgically to avoid the chances of fertilization. This is called
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Graafian follicles are produced by the ovary by the process of
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