If both parents are carriers for thalassaemia | vedclass

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Question

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

Vedclass · Accepted Answer

$0.25$

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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 $Tt 	imes Tt$,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 $0.25$.

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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