THE MOLECULAR BASIS OF INHERITANCE
THE GENETICS OF VIRUSES AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1/2
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1/4
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1/8
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1/16
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Detailed explanation-1: -So a carrier’s son has a 50% chance of having hemophilia. A baby girl will inherit an X chromosome with a dominant gene for normal blood clotting from her father. So the daughter will not have hemophilia.
Detailed explanation-2: -If a mother is heterozygous (a carrier) for hemophilia and the father does not have hemophilia, each son has a 1 in 2 (50%) chance of getting his mother’s hemophilia allele and having hemophilia. Each daughter has a 1 in 2 (50%) chance of getting her mother’s hemophilia allele and being heterozygous.
Detailed explanation-3: -As shown in the above diagram, the female offspring will not have hemophilia. However, there is a 50% chance that a female will be a carrier of the disorder. For a male offspring, there is a 50% chance that he will not inherit the disorder and a 50% that he will have hemophilia.