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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
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.
Briefly describe the process of spermatogenesis.
Name the functions - Acrosome of sperm.
Multiple choice question.
The given figure shows human sperm. Various parts of it are labelled as A, B, C, and D. Which labelled part represents acrosome?

Describe the process of oogenesis in human female.
Explain two main process in sexual reproduction.
Sex organs produce gametes which are diploid.
Expand the acronym.
LH
Which of the following are known as the nourishing cells present in the seminiferous tubules?
Identify the labels (i-iv) in the given diagram of the ovum.

Identify the CORRECT sequence of events.
First meiotic division is observed in ____________.
______ undergoes 2nd meiotic division during spermatogenesis.
Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
By which process sperms released from the seminiferous tubules?
Corona radia is made up of ______.
A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is ______.
The nutritive cells found in seminiferous tubules are ______.
The principal tail piece of human sperm shows the microtubular arrangement of ______.
1st polar body is formed at which stage of oogenesis?
Which one is released from the ovary?
In oogenesis haploid egg is fertilised by sperm at which stage?
Mark the odd one.
Fetal sex can be determined by examining cells from amniotic fluid looking for:
3-celled male gamete develops in:
Which of the following cells during gametogenesis is normally diploid?
How many spermatozoa are formed from one secondary spermatocyte?
Sketch and label the process of oogenesis.
Complete the analogy with respect to the structure of sperm.
Nebenkern : ‘X’ : : Acrosome is formed from : ‘Y’
