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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Which type of cell division forms spermatids from the secondary spermatocytes?

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प्रश्न

Which type of cell division forms spermatids from the secondary spermatocytes?

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उत्तर

The secondary spermatocytes undrego the second meiotic division to produce four equal, haploid spermatids.

Not Secondary spermatocytes are produced, when the primary spermatocytes undergo the first meiotic division (reduction division).

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अध्याय 3: Human Reproduction - VERY SHORT ANSWER [पृष्ठ २१]

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एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 12
अध्याय 3 Human Reproduction
VERY SHORT ANSWER | Q 15. | पृष्ठ २१

संबंधित प्रश्न

Briefly describe the process of spermatogenesis.


Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.


Give scientific reason.

Older women are more likely to give birth to children with some abnormalities.


Answer the following type of question Assertion (A) and Reason (R).

(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.

(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.


Draw a labeled sketch of a spermatozoan.


Describe the structure of the human ovum with a neat labelled diagram.


Give a schematic representation of spermatogenesis and oogenesis in humans.


Which of the following correctly describes the secondary oocyte?


500 spermatozoa are formed from ____________ secondary spermatocytes.


Which is the correct order of steps occurring during spermatogenesis?


What is the location of oogenesis?


______ undergoes 2nd meiotic division during spermatogenesis.


By which process sperms released from the seminiferous tubules?


Preparation of sperm before penetration of ovum is ______.


Layers of an ovum from outside to inside is ______.


What does the figure represent?


Sperms can be stored for several years in liquid nitrogen with a temperature of ______.


3-celled male gamete develops in:


Process of maturation and development of sperms ______.


The diagram given below shows the various steps in spermatogenesis.

  1. Name the parts labelled '1', '2' and '3'.
  2. Name the process by which part '3' changes to part '4'.

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