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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
Give the name and function for ‘A’ and ‘B’ from the diagram given below
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions:
- Acrosome
- Nucleus
- Middle piece
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.
Ovulation is induced by a hormone called ______.
Define spermiation.
Implantation of embryo occurs in ______.
What is gamete formation?
The glandular accessory organ which produces the largest proportion of semen is ____________.
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.
Identify the given image and label its parts marked as a, b, c and d
The secondary oocyte enter into the fallopian tube through the ______.
Identify the CORRECT sequence of events.
Draw a labelled diagram of a Graafian Follicle.
How many autosomes does a human primary spermatocyte have?
Acrosome reaction in sperm is triggered by ______.
After ovulation, Graafian follicle regresses into ______.
The head of the epididymis at the head of the testis is called ______.
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
In the process of fertilization, this is true:
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:
Growth hormone of pituitary is more effective in ______.
Which of the following cells during gametogenesis is normally diploid?
Germ cells present in the seminiferous tubules undergo ______
The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
What is spermatogenesis?
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
During oogenesis the meiotic division is arrested at ______ before fertilization.
