What are the chances of the birth of a boy or a girl during sexual
reproduction in human beings?
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Justification of statement is as follows
- Sex determination depends upon the presence of sex chromosomes. There exists two types of sex chromosomes namely X and Y chromosome.
- Females carry XX sex chromosomes while males carry XY chromosome. X chromosome from father results in girl child while Y chromosome from father results in boy child.
- Hence, their exists 50% chance of fertilization of X carrying ovum(from mother), by sperm carrying X or Y chromosome(from father). Thus, the given statement is justified.
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