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प्रश्न
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
विकल्प
1 to 2 million
2 to 3 million
2 to 4 million
none of these
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उत्तर
At the time of birth, there are 2 to 4 million oocytes in the ovary of a female foetus.
APPEARS IN
संबंधित प्रश्न
Name the hormones involved in regulation of spermatogenesis.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
In meiosis, the number of chromosomes becomes ___________.
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
Formation of ____________ is an indication of the termination of oogenesis.
Select the pair of cells which does not divide further by mitosis.
How many autosomes does a human primary spermatocyte have?
The immature male germ cell undergo division to produce sperms by the process of spermatogenesis.
Choose the correct one with reference to the above.
There is no cell division involved in ______.
Layers of an ovum from outside to inside is ______.
The prostate gland and seminal vehicle perform the function of ______.
Penetration of the sperm in the ovum is followed by ______
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
3-celled male gamete develops in:
Which of the following cells during gametogenesis is normally diploid?
Capacitation refers to changes in the ______.
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
What is spermatogenesis?
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
