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प्रश्न
Fill the blank circles in figure and identify the sex of child A and B.
रिकाम्या जागा भरा
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उत्तर
The circle in the figure can be completed as:
A is a girl. The ovum carrying X-chromosome has been fertilised by a sperm carrying X-chromosome, resulting in a zygote with XX combination of sex chromosomes. So, the child born will be a female.
B is a boy. In this case, the X-chromosome carrying ovum has been fertilised by a sperm carrying Y-chromosome. This results in formation of zygote with XY combination of sex chromosomes. So, the child born will be a male.
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