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NEET · Biology · STD 12 - 4. principal of inheritance and variation

જો બંને પિતૃઓ થેલેસેમીયાના વાહક હોય જે દૈહિક રંગસૂત્રીય પ્રચ્છન્ન ખામી છે. ગર્ભાધાનને કારણે અસરકારક બાળક હોવાની સંભાવના કેટલી?

  1. A \(0.25\)
  2. B \(1\)
  3. C કોઈ સંભાવના નહીં
  4. D \(0.5\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(0.25\)

Step-by-step Solution

Detailed explanation

(a): Thalassaemia is an autosomal recessiveblood disorder. In the given case, both the partners are unaffected carriers for the gene \(i.e.\), have heterozygous genotype \(Tt\). Persons homozygous for the autosomal recessive gene of \(\beta\)-­thalassaemia suffer from severe haemolytic anaemia. Heterozygous persons are also not normal, but show the defect in a less severe form (thalassaemia minor). 
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