SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Females-XX; MalesXY. A couple has 4 girls. What is the chance the next child will be a boy?
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75%
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100%
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25%
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50%
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Explanation:
Detailed explanation-1: -Each pregnancy has a 50% chance of resulting in a boy or girl and this does not include the possibility of multiples. Having 3 daughters previously does not affect the chances of any resulting pregnancy.
Detailed explanation-2: -The chances of an offspring being male or female is 50:50 due to several factors. While the movement of sperm is always random, the number of sperm carrying X and Y chromosome respectively is almost equal. This means that both types of sperm have equal chances of fertilizing the egg.
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