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प्रश्न
Women are often blamed for producing female children. Consequently, they are ill-treated and ostracized. How will you address this issue scientifically if you were to conduct an awareness programme to highlight the values involved?
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
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उत्तर
Women are never responsible for determination of the sex of a child. Moreover, it is not appropriate to ill-treat a woman for giving birth to a girl child, as both males and females are equally important for the balance of nature and continuity of our species.
All human-beings have 23 pairs of chromosomes. A human sperm (haploid) has 22 autosomes and one of the two types of sex chromosomes, i.e. either X or Y. On the contrary, human females have 22 autosomes that are exactly same as males and contain two X chromosomes. The sex of an individual is determined by the type of the sex chromosome (X or Y) contained by the sperm that fuses with the ovum.
If the fertilising sperm has an X chromosome, then the baby would be a female and if a sperm with Y chromosome fuses with the ovum, it will develop into a male child. Thus, males are responsible for determination of the sex of a child.
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संबंधित प्रश्न
Define spermiation.
Fill in the blank.
---------- type of reproduction occurs without fusion of gametes.
Describe the process of spermatogenesis with the help of diagram.
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
In meiosis, the number of chromosomes becomes ___________.
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
The male sex hormone testosterone is secreted from ____________.
Give a schematic representation of spermatogenesis and oogenesis in humans.
Expand the acronym.
hCG
Formation of ____________ is an indication of the termination of oogenesis.
Which of the following occurs during maturation phase of spermatogenesis?
500 spermatozoa are formed from ____________ secondary spermatocytes.
Select the correct sequence of oogenesis.
______ undergoes 2nd meiotic division during spermatogenesis.
Select the pair of cells which does not divide further by mitosis.
There is no cell division involved in ______.
Spermiation is the process of the release of sperm from ______.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
The nutritive cells found in seminiferous tubules are ______.
The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called ______.
Layers of an ovum from outside to inside is ______.
Which of the following is a primary sex organ of female?
Select the correct sequence of stages of spermatogenesis in a human male ______.
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:
What is the difference between a primary oocyte and a secondary oocyte?
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.
Meiotic division of the secondary oocyte completed ______.
Sketch and label the process of oogenesis.
