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प्रश्न
Draw a labelled diagram of sperm.
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उत्तर १
उत्तर २
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संबंधित प्रश्न
Define spermiation.
What is oogenesis?
Name the functions - Acrosome of sperm.
In meiosis, the number of chromosomes becomes ___________.
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?
The male sex hormone testosterone is secreted from ____________.
Mammalian egg is ____________.
The process which the sperm undergoes before penetrating the ovum is ____________.
At what stage of development are the gametes formed in newborn male and female?
Identify the given image and label its parts marked as a, b, c and d
Identify the labels (i-iv) in the given diagram of the ovum.
Formation of ____________ is an indication of the termination of oogenesis.
What is the location of oogenesis?
The human male gamete is usually about ______ in length.
How many sperms are formed from a secondary spermatocyte?
Extrusion of second polar body from egg nucleus occurs ______.
During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called ______.
1st polar body is formed at which stage of oogenesis?
Which one is released from the ovary?
Which of the following is a primary sex organ of female?
Which of the following are called dual gland?
Read the following and answer from given below:
Oogenesis is the process of the formation of an ovum in the ovaries. It consists of three phases: multiplication, growth, and maturation. Oogenesis is controlled by hormones GnRH, LH, FSH. GnRH secreted by the hypothalamus stimulates the anterior lobe of the pituitary gland to secrete LH and FSH.
Which cell division is involved in the formation of secondary oocytes?
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
In the process of fertilization, this is true:
In human females, meiosis II is not completed until:
Meiotic division of the secondary oocyte completed ______.
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
At the onset of puberty, gonadotropin releasing hormone is secreted by ______.
Which gamete is produced through oogenesis?
What is the primary purpose of gametogenesis in organisms?
