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Study the pedigree chart and determine the mode of inheritance :
Inheritance of a condition like phenylketonuria as an autosomal recessive trait.
The pedigree chart is wrong as this is not possible.
Inheritance of an X-linked recessive disease like Hemophilia
Inheritance of a sex - linked inborn error of metabolism like phenylketonuria.
Answers (1)
As we have already studied in Determining the inheritance pattern of autosomal recessive disorder -
As per this question, The chart shows the inheritance of an autosomal recessive trait like phenylketonuria. An autosomal recessive trait may skip a generation. It appears in case of marriage between two heterozygous individuals (Aa x Aa = 1AA + 2Aa + 1aa), a recessive individual with hybrid (Aa x Aa = 2Aa + 2aa) and two recessive (aa x aa = all aa).
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