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प्रश्न
Explain two main process in sexual reproduction.
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उत्तर
Two main processes involved in sexual reproduction:
- Gamete formation: In this, meiotic division occurs due to which chromosome number is reduced to half. As a result, haploid gametes are formed (2n → n).
- Fertilization: Haploid male gamete (n) fuses with the haploid female gamete (n) to form a diploid zygote (2n).
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संबंधित प्रश्न
Define spermiation.
Name the functions - Acrosome of sperm.
In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?
Sex organs produce gametes which are diploid.
Draw a labeled sketch of a spermatozoan.
Expand the acronym.
hCG
The part labelled as ______ contains the energy source that facilitates sperm motility.
Identify the proper order of spermatogenesis and choose the correct option.
500 spermatozoa are formed from ____________ secondary spermatocytes.
Draw a labelled diagram of a Graafian Follicle.
Select the pair of cells which does not divide further by mitosis.
In human beings, the largest cell formed during Oogenesis is ______
Identify the wrong statement from the following.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
Select the correct sequence of stages of spermatogenesis in a human male ______.
If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:
How many primary oocytes produce one oogonia?
Distinguish between human sperm and ovum.
Draw a labelled diagram of a section through the ovary.
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
