OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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75%
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100%
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25%
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50%
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Detailed explanation-1: -The gender of the consecutive children does not depend on each other. So, every time the couple has a kid, there is equal chances of them having a girl or a boy. Therefore, the probability would be 50% reasonably.
Detailed explanation-2: -The ratio of male to female births, called the sex ratio, is about 105 to 100, according to the World Health Organization (WHO). This means about 51% of deliveries result in a baby boy.
Detailed explanation-3: -Males have XY sex chromosomes while females have XX sex chromosomes; the male can contribute the X or Y chromosome, while the female must contribute one of their X chromosomes. A male infant results if the male contributes his Y chromosome while a female infant results if he contributes his X chromosome.