| Study the following pedigree. |
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| Choose the correct interpretation. |
A) if the pedigree depicts autosomal recessive trait, then the probability of child ?P? to be diseased is \[\frac{1}{2}\].
B) if the pedigree depicts X-linked recessive trait, then the probability of child ?P? to be diseased is \[\frac{1}{4}\].
C) If the pedigree depicts sex-linked trait, then there is a \[50%\]change that individual ?P? will be normal.
D) The pedigree depicts X-linked dominant trait, then the individual ?P? will be normal if female.
Correct Answer: B
Solution :
The given pedigree shows the parents are heterozygous and if it depicts autosomal recessive trait, then the probability of child 'P' to be diseased is 1/4. If the pedigree depicts sex-linked trait, then there is \[75%\] chance that individual 'P' will be normal. This pedigree does not depict X-linked dominant trait as parents are not affected.
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