What is the probability of being pregnant by twins giving birth to a girl and boy
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probability of giving birth to a boy and girl is 1/3
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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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