Question:
Study the pedigree chart given below. What does it show?
Study the pedigree chart given below. What does it show?
Updated On: Jul 9, 2024
- inheritance of a condition like phenylketonuria as an autosomal recessive trait
- the pedigree chart is wrong as this is not possible
- inheritance of a recessive sex-linked disease like haemophilia
- inheritance of a sex-linked inborn error of metabolism like phenylketonuria
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The Correct Option is A
Solution and Explanation
This chart shows 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 = 3 Aa + 1 aa), a recessive individual with hybrid (Aa x aa = 2 Aa + 2 aa) and two recessive (aa x aa = all aa). Phenylketonuria is an inborn, autosomal, recessive metabolic disorder in which homozygous recessive individual lacks the enzyme phenylalanine hydroxylase. The heterozygous individuals are normal but carriers.
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Concepts Used:
Mendelian Disorders
Mendelian Disorder is a type of genetic disorder that is caused due to alterations in one gene or abnormalities in the genome. These disorders can be seen since birth and can be deduced using the Pedigree Analysis.
