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प्रश्न
Does the sex of the child depend on the father or it is just a matter of chance? Discuss.
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उत्तर
The sex of the child depends on the father. The egg contains only one X chromosome, but half of the sperm contain an X chromosome whereas the other half contains a Y chromosome. It is simply a matter of chance as to which category of sperm fuses with the ovum and this determines whether the child will be male or female.
If the egg fuses with X-bearing sperm, the resulting combination is XX and the resulting child is female. If the egg fuses with Y-bearing sperm, the resulting combination is XY and the resulting child is male.
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संबंधित प्रश्न
Which of the two, sperm or ovum, decides the sex of the child?
A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be :
(a) 46
(b) 23
(c) 21
(d) 42
Name two animals which have nineteen pairs of chromosomes.
Define the following:
Autosomes
Brief about female heterogamety.
The ‘X’ body of Henking was observed in ______.
Number of autosomes present in liver cells of a human female is ______.
Which of the following decides the sex of the child?
The two versions of a trait (character) which are brought in by the male and female gametes are situated on
Fill the blank circles in figure and identify the sex of child A and B.
