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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
Identify True/False statement. Correct the false statement to make it true.
Oogenesis takes place in the corpus luteum.
Give scientific reason.
Older women are more likely to give birth to children with some abnormalities.
Give scientific reason.
There is a menopause when women are 45-50 years old.
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.
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
Expand the acronym.
LH
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
Which of the following enter the maturation phase of oogenesis?
Which of the following occurs during maturation phase of spermatogenesis?
Identify the enzyme released by the sperm which has lytic activity.
First meiotic division is observed in ____________.
The human male gamete is usually about ______ in length.
How many sperms are formed from a secondary spermatocyte?
Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
There is no cell division involved in ______.
Spermiation is the process of the release of sperm from ______.
Besides activating the egg another role of a sperm is to carry ______ to egg.
How many sperms are formed from 4 primary spermatocytes?
Which one is released from the ovary?
Layers of an ovum from outside to inside is ______.
Mark the odd one.
The number of chromosome groups at the equatorial plate in metaphase-I of meiosis in a plant with 2n = 50 shall be:
Capacitation refers to changes in the ______.
How many primary oocytes produce one oogonia?
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?
Sketch and label the process of oogenesis.
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
Explain Oogenesis with diagram.
