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प्रश्न
Name the functions - Acrosome of sperm.
What is the function of acrosome of sperm.
Name the function of the following:
Acrosome
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उत्तर
It is a cap-like structure present in the anterior part of the head of the sperm. It contains the hyaluronidase enzyme, which hydrolyses the outer membrane of the egg, thereby helping the sperm to penetrate the egg at the time of fertilization.
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संबंधित प्रश्न
The process of release of the ovum from a mature follicle is called ______.
In meiosis, the number of chromosomes becomes ___________.
Give scientific reason.
Older women are more likely to give birth to children with some abnormalities.
Give scientific reason.
There is a menopause when women are 45-50 years old.
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?
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
The male sex hormone testosterone is secreted from ____________.
Mammalian egg is ____________.
Identify the given image and label its parts marked as a, b, c and d
Expand the acronym.
hCG
Formation of ____________ is an indication of the termination of oogenesis.
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Identify the correct stages (P - S) in the given diagram of spermatogenesis.
Find out the CORRECT sequence of spermatogenesis.
How many sperms are formed from a secondary spermatocyte?
Middle piece of mammalian sperm possesses ______.
Extrusion of second polar body from egg nucleus occurs ______.
Connective tissue around seminiferous tubules possess endocrine cells called ______.
Corona radia is made up of ______.
Which among the following has 23 chromosomes?
Cavity of graafian follicle is ______.
Which of the following groups of cells in the male gonad, represent haploid cells?
The principal tail piece of human sperm shows the microtubular arrangement of ______.
1st polar body is formed at which stage of oogenesis?
Which one is released from the ovary?
During oogenesis, each diploid cell produces ______.
Aquatic animals in which fertilisation occurs in water are said to be
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
In the process of fertilization, this is true:
Human milk differs from cow's milk because human milk contains:
The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.
During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring. What are the processes through which these events take place?
Given below are two statements.
- Statement I: The spermatids are non-motile and non-functional which get transformed into functional spermatozoa by the process of spermiogenesis.
- Statement II: During the process of this change, the spermatids remain held to each other and to Leydig's cells by cytoplasmic bridges.
In light of the above statements, select the correct answer from the option given below.
What is spermatogenesis?
Explain Oogenesis with diagram.
The diagram given below shows the various steps in spermatogenesis.
- Name the parts labelled '1', '2' and '3'.
- Name the process by which part '3' changes to part '4'.
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?
The process of gametogenesis is initiated by ______ and ______ hormones respectively.
Select a correct pair of cells with identical set of chromosomes.
