Advertisements
Advertisements
प्रश्न
How is 'oogenesis' markedly different from 'spermatogenesis' with respect to the growth till puberty in the humans?
Advertisements
उत्तर
|
Spermatogenesis
|
Oogenesis
|
|
It is the process by which sperms are formed from the sperm mother cell in males
|
It is the process by which ovum is formed from the oogonia in females
|
|
After the second meiotic divisions in a single spermatogonium, 4 spermatids are obtained, which undergo maturation to form 4 sperm cells, or spermatozoa
|
After the second meiotic divisions in the single oogonium, only one ovum and three polar bodies are obtained.
|
|
Spermatogenesis occurs in males from puberty almost until death.
|
In females, oogenesis starts before birth and occurs until menopause.
|
APPEARS IN
संबंधित प्रश्न
The following is the illustration of the sequence of ovarian events (a − i) in a human female
(i) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
(ii) Name the ovarian hormone and the pituitary hormone that have caused the above mentioned event.
(iii) Explain the changes that occur in the uterus simultaneously in anticipation.
(iv) Write the difference between ‘c’ and ‘h’.
(v) Draw a labeled sketch of the structure of a human ovum prior to fertilization.
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.
Answer the following type of question Assertion (A) and Reason (R).
(A) - Head of the sperm consists of acrosome and mitochondria.
(R) - Acrosome contains spiral rows of mitochondria.
Describe the structure of the human ovum with a neat labelled diagram.
What is the location of oogenesis?
First meiotic division is observed in ____________.
Cavity of graafian follicle is ______.
How many primary oocytes produce one oogonia?
Which type of cell division forms spermatids from the secondary spermatocytes?
Complete the analogy with respect to the structure of sperm.
Nebenkern : ‘X’ : : Acrosome is formed from : ‘Y’
