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प्रश्न
Explain how the sex of the child is determined at the time of conception in human beings.
उत्तर
Every somatic (body) cell of humans contains 23 pairs of chromosomes. Out of these 23 pairs, the first 22 pairs (44 chromosomes) do not determine the sex of an individual and they are known as autosomes. The remaining one pair determines the sex of the individual. This last pair is known as the sex chromosomes and are represented as X and Y.
The male gametes have 22 autosomes and either an X or a Y sex chromosome.
On the other hand, the females have XX sex chromosomes, along with the 22 autosomes. This means that their gametes can only have an X sex chromosome
Therefore, the sex of the child is determined by the type of the sperm (containing an X or a Y sex chromosome) which fuses with the egg cell (containing an X chromosome) at the time of conception.
If the X gamete of the male fuses with the X gamete of the female, then the offspring will be female.
On the other hand, if the Y gamete of the male fuses with the X gamete of the female, then the offspring will be male.
APPEARS IN
संबंधित प्रश्न
Name the human male reproductive organ that produces sperms and also secretes a hormone. Write the functions of the secreted hormone.
the Biological/technical term for The canal through which the testes descend into the scrotum just before the birth of a male baby
State the main function of the Sperm duct.
Give technical terms for Thin walled sac of skin which covers the testes
What name is given to the fusion of sperm and ovum?
Describe the process of fertilisation in humans and development of embryo briefly.
Choose the correct answer:
Fertilization occurs in _____________
Answer the following question:
Why are family planning measures needed in our country?
Differentiate on the basis of what is indicated in brackets :
The prostate gland and Cowper’s gland (the nature of secretion)
Choose the Odd One Out:
