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In human beings, the statistical probability of getting either a male or female child is 50:50. Give a suitable explanation.
In humans, every cell contains 23 pairs of chromosomes or 46 chromosomes.
Out of these 46 chromosomes, 44 chromosomes are autosomes and 2 are sex chromosomes.
The two sex chromosomes in females are similar to each other and written as XX, while in male, they are dissimilar and mentioned as XY.
The gametes produced by females (ovum) contains all (22 + X) type of chromosomes, while male gametes (sperms) contains either (22 + X) or (22 + Y) type of chromosomes.
There is a 50% probability of male to produce (22 + X) and a 50% of probability to produce (22 + Y) type of chromosomes.
Therefore, there is a 50% probability of the birth of a boy and a 50% probability that a girl will be born.
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