(A) Thalassaemia is an autosomal recessive blood disorder. Let the normal allele be $T$ and the recessive allele for thalassaemia be $t$. Both parents

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(A) Thalassaemia is an autosomal recessive blood disorder. Let the normal allele be $T$ and the recessive allele for thalassaemia be $t$. Both parents are carriers,meaning their genotype is $Tt$. When crossing $Tt \times Tt$,the possible genotypes of the offspring are $TT$ (normal),$Tt$ (carrier),$Tt$ (carrier),and $tt$ (affected). The probability of an affected child $(tt)$ is $1/4$ or $0.25$.

Class 12 Biology Principles of Inheritance and Variation Pedigree Analysis and Mendelian disorders

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If both parents are carriers for thalassaemia,which is an autosomal recessive disorder,what are the chances of pregnancy resulting in an affected child?

NEET 2013 All NEET

A
$0.25$
B
$1$
C
No chance
D
$0.5$

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Principles of Inheritance and Variation

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Pedigree Analysis and Mendelian disorders

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If both parents are carriers for thalassaemia,which is an autosomal recessive disorder,what are the chances of pregnancy resulting in an affected child?

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