In the $\beta$-globin chain of haemoglobin of an individual,if the sixth amino acid,Glutamic acid (Glu),is replaced by Valine (Val),then the individual will be suffering from:

  • A
    Albinism
  • B
    Haemophilia
  • C
    Sickle-cell anaemia
  • D
    Phenylketonuria

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Similar Questions

$A$ colourblind man has a colourblind sister but a normal brother. What is the phenotype of his parents?

$A$ son of a colourblind father and a normal homozygous mother marries a daughter of a normal father and a heterozygous (carrier) mother. What will be the phenotype of their children?

Match the following symbols used in Pedigree analysis:
Column-$I$ Column-$II$
$a.$ Solid symbol$(i)$ Carrier of sex-linked trait
$b.$ Horizontal line between symbols$(ii)$ Offspring
$c.$ Horizontal line above the symbols$(iii)$ Affected individual (Trait to be studied)
$d.$ Dot in centre$(iv)$ Mating (Parents)

$A$ haemophilic man marries a normal woman. Their offspring will be:

Assertion: Haemophilia is a recessive sex-linked disease.
Reason: Haemophilia occurs due to mutation of a structural gene on chromosome $15$.

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