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प्रश्न
Draw a labelled diagram of a section through the ovary.
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उत्तर १
उत्तर २
APPEARS IN
संबंधित प्रश्न
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions:
- Acrosome
- Nucleus
- Middle piece
Ovulation is induced by a hormone called ______.
Name the functions - Acrosome of sperm.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
Describe the process of oogenesis in human female.
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
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 ____________.
The process which the sperm undergoes before penetrating the ovum is ____________.
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.
Expand the acronym.
LH
Complete the analogy.
1 primary spermatocyte : 4 spermatozoa :: 1 primary oocyte : ____________.
The secondary oocyte enter into the fallopian tube through the ______.
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Identify the enzyme released by the sperm which has lytic activity.
Extrusion of second polar body from egg nucleus occurs ______.
The cell which undergoes meiosis I during spermatogenesis is the ______.
Cavity of graafian follicle is ______.
Preparation of sperm before penetration of ovum is ______.
During oogenesis, each diploid cell produces ______.
Head of epididymis is called as ______.
Observe the given figure and answer the questions that follow.
- Label A and B.
- Identify the process.
- What happens during this process and what is formed?
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:
In human females, meiosis II is not completed until:
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?
What is the difference between a primary oocyte and a secondary oocyte?
Process of maturation and development of sperms ______.
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
